D236 Test Bank: Key Questions & Answers Guide

Study Guide Questions and Answers

Describe how your body responds to an infection

When the body encounters an infection, the immune system initiates a highly coordinated response to neutralize and eliminate invading microorganisms. The process begins with T lymphocytes (T-cells), which release signaling molecules called cytokines. These cytokines orchestrate the immune response by activating B lymphocytes (B-cells). B-cells then generate antibodies, which are specialized proteins that specifically bind to antigens on pathogens. This binding either directly neutralizes the pathogen or tags it for destruction by other immune cells such as macrophages. This integrated cellular (T-cell mediated) and humoral (antibody-mediated) immunity not only combats the current infection but also establishes immunological memory to protect against future encounters (Abbas, Lichtman, & Pillai, 2018).

Identify the role of DNA changes in congenital abnormalities

Genetic alterations play a pivotal role in the development of congenital abnormalities, which are structural or functional defects present at birth. These abnormalities often result from mutations—either inherited from parents or arising spontaneously during cell division—that disrupt genes critical for fetal development. Additionally, chromosomal anomalies such as deletions, duplications, or rearrangements can lead to an imbalance of genetic material. These disruptions interfere with the normal growth, differentiation, and organization of tissues and organs, resulting in malformations or functional impairments evident at birth (Moore, Persaud, & Torchia, 2020). It is important to note that environmental factors may also interact with genetic predispositions, further influencing the risk.

How does development disrupt congenital abnormalities?

Congenital defects arise primarily from disturbances in the tightly regulated processes of embryonic and fetal development. During early development, gene expression and cell signaling pathways ensure proper tissue differentiation and organogenesis. Genetic mutations or chromosomal abnormalities at this critical stage can disrupt these processes. For instance, improper closure of the neural tube due to faulty genetic regulation can lead to spina bifida, a common neural tube defect. Such developmental interruptions result in structural deformities or functional deficits that become apparent after birth (Sadler, 2019).

Describe factors that disrupt homeostasis and how disruptions affect wellbeing

Homeostasis is the body’s mechanism to maintain a stable internal environment despite external fluctuations. Various factors can disrupt this balance, including fluid and electrolyte imbalances, infections, trauma, and chronic diseases. For example, dehydration decreases fluid volume and alters electrolyte concentrations like sodium and potassium, essential for nerve and muscle function. These imbalances manifest as symptoms such as muscle cramps, nausea, vomiting, and cardiac arrhythmias. Persistent homeostatic disruption can impair vital organ functions, thereby jeopardizing overall health and wellbeing (Hall & Guyton, 2021).

Explain RAAS (Renin-Angiotensin-Aldosterone System)

The Renin-Angiotensin-Aldosterone System (RAAS) is a hormone-driven regulatory network critical for maintaining blood pressure and fluid homeostasis. When renal blood flow decreases, specialized juxtaglomerular cells in the kidneys secrete renin, an enzyme that converts angiotensinogen from the liver into angiotensin I. Angiotensin I is then converted to angiotensin II by angiotensin-converting enzyme (ACE), mainly in the lungs. Angiotensin II constricts blood vessels, raising blood pressure, and prompts the adrenal cortex to release aldosterone, which enhances sodium and water retention by the kidneys. This combination increases blood volume and pressure, helping to stabilize cardiovascular function during states of low blood flow (Klabunde, 2017).

Diabetic Ketoacidosis (DKA)

Diabetic ketoacidosis (DKA) is a severe, life-threatening complication of diabetes characterized by metabolic acidosis with an elevated anion gap. It develops when insulin deficiency causes increased lipolysis, leading to excessive production of ketone bodies. The resulting acidosis reduces bicarbonate (HCO₃⁻) levels as the body attempts to buffer the excess acid. Clinically, DKA presents with dehydration, rapid and deep breathing (Kussmaul respirations), abdominal pain, and altered mental status. Immediate medical intervention is necessary to restore metabolic balance and prevent complications (Kitabchi et al., 2009).

How do kidneys compensate for alkalosis?

When blood pH rises abnormally, indicating alkalosis, the kidneys respond by conserving hydrogen ions (H⁺) and increasing the excretion of bicarbonate ions (HCO₃⁻). This renal compensation helps reduce the alkalinity of the blood and restore acid-base equilibrium. While this process is slower compared to respiratory compensation, it plays a vital role in maintaining long-term homeostasis during metabolic alkalosis (Rose & Post, 2001).

Untreated acidosis leads to an increase in which electrolyte?

If acidosis remains untreated, blood potassium levels typically rise, a condition known as hyperkalemia. This happens because excess hydrogen ions (H⁺) move into cells in exchange for potassium ions (K⁺), which exit into the bloodstream. Elevated potassium levels pose significant risks, including cardiac arrhythmias and muscle weakness, highlighting the urgency of treating acidosis promptly (Adrogué & Madias, 2000).

West Nile Virus

West Nile Virus (WNV) is primarily transmitted by infected Culex mosquitoes and belongs to the flavivirus family. While most infected individuals experience mild or no symptoms, some develop a febrile illness with fever, headache, and muscle weakness. In rare cases, particularly in older adults, WNV can cause severe neuroinvasive disease such as encephalitis or meningitis. Preventative strategies emphasize mosquito control and protective measures to avoid bites (Sejvar, 2014).

Lyme Disease

Lyme disease, caused by the spirochete Borrelia burgdorferi, is transmitted through tick bites, mainly from the Ixodes species. Early symptoms include fever, fatigue, headache, and the characteristic “bull’s-eye” rash called erythema migrans. If untreated, Lyme disease can lead to complications affecting the joints, heart, and nervous system. Early antibiotic treatment is crucial to prevent long-term sequelae (Steere et al., 2016).

Erythema Infectiosum

Commonly referred to as “fifth disease,” erythema infectiosum is caused by parvovirus B19. It begins with mild respiratory symptoms and low-grade fever, followed by a distinctive bright red rash on the cheeks in children, sometimes spreading to the trunk and limbs. Adults may experience joint pain. The condition is usually mild and resolves without complications (Heegaard & Brown, 2002).

Obesity and Diabetes as Risk Factors for Having a Child with Spina Bifida

Maternal obesity and diabetes are significant risk factors for neural tube defects such as spina bifida. These conditions may interfere with folate metabolism and embryonic development, increasing the likelihood of neural tube closure failure. Ensuring optimal maternal health, including adequate folic acid intake before and during pregnancy, can substantially reduce the risk of these congenital anomalies (Miller et al., 2010).

Trousseau’s Sign

Trousseau’s sign is a clinical indicator of hypocalcemia, where inflating a blood pressure cuff above systolic pressure causes ischemia and a characteristic spasm of the hand (carpal spasm). This neuromuscular irritability reflects low calcium levels and requires further assessment and management to prevent complications (Koul et al., 2017).

Cause and Sign of Spina Bifida

Spina bifida results from incomplete closure of the neural tube during early embryogenesis, typically between the third and fourth weeks of gestation. A visible sign is a fluid-filled sac on the lower back where spinal tissues protrude. Severity ranges from mild (spina bifida occulta) to severe (myelomeningocele), often accompanied by neurological impairments (Wallingford et al., 2013).

Hemophilia is More Common in Males

Hemophilia is an X-linked recessive bleeding disorder caused by deficiencies in clotting factors VIII or IX. Since males have a single X chromosome, they are more susceptible to manifesting the disease, while females usually are carriers. The disorder leads to prolonged bleeding and requires replacement therapy to manage bleeding episodes (Mannucci & Tuddenham, 2001).

Prenatal Exposure to Alcohol: ND-PAE, Decreased Brain Function, FAS

Alcohol use during pregnancy can cause a range of neurodevelopmental disorders collectively known as Neurodevelopmental Disorder Associated with Prenatal Alcohol Exposure (ND-PAE), including Fetal Alcohol Syndrome (FAS). These conditions result in brain damage, cognitive impairments, behavioral issues, and distinct facial abnormalities. Abstaining from alcohol during pregnancy is essential for prevention (May & Gossage, 2011).

Connective vs. Muscle Tissue Disorders

Describe Lupus

Lupus is a chronic autoimmune disease where the immune system attacks the body’s own tissues, causing inflammation. Common symptoms include joint pain, fatigue, and a butterfly-shaped rash across the cheeks and nose. It can affect multiple organs, necessitating comprehensive medical care (Tsokos, 2011).

Describe Myasthenia Gravis

Myasthenia gravis is an autoimmune neuromuscular disorder where antibodies block acetylcholine receptors at the neuromuscular junction, leading to muscle weakness that worsens with activity. Symptoms include ptosis (drooping eyelids), double vision, and difficulty swallowing. Treatments involve immunosuppressive drugs and acetylcholinesterase inhibitors (Gilhus, 2016).

Dermatitis

Dermatitis is inflammation of the skin caused by irritation or allergic reactions. It typically presents as redness, itching, and sometimes blistering or scaling. Common types include contact dermatitis and atopic dermatitis (eczema), treated by avoiding triggers and using topical therapies (Langan et al., 2020).

Eczema

Eczema is a chronic inflammatory skin condition marked by itchy, red, and sometimes crusted lesions. It often starts in childhood and is associated with other allergic diseases such as asthma. Management involves skin hydration and anti-inflammatory medications (Weidinger & Novak, 2016).

Decubitus Ulcer

Also known as pressure sores, decubitus ulcers result from prolonged pressure on the skin, especially in immobilized patients over bony prominences. If untreated, they can cause deep tissue injury and infections. Management includes pressure relief and wound care (National Pressure Injury Advisory Panel, 2019).

Fungal Infections

Fungal infections arise from pathogenic fungi invading the skin or internal tissues. They may be superficial (e.g., athlete’s foot) or systemic. Transmission varies, and treatment includes topical or systemic antifungals (Kauffman, 2006).

Benign Neoplasm

A benign neoplasm is a localized, noncancerous growth with smooth, well-defined edges. These tumors grow slowly and do not invade or metastasize but may cause symptoms by compressing nearby structures (Weinberg, 2014).

Malignant Neoplasm

Malignant neoplasms, or cancers, show uncontrolled growth with irregular margins and the ability to invade nearby tissues and metastasize. They pose serious health threats and often require aggressive treatment, including surgery, chemotherapy, and radiation (Hanahan & Weinberg, 2011).

Osteoporosis

Osteoporosis is a bone disease characterized by decreased bone density and increased fracture risk. It is commonly associated with aging and estrogen deficiency post-menopause. Prevention includes adequate calcium, vitamin D, and physical activity (NIH Osteoporosis and Related Bone Diseases National Resource Center, 2018).

Osteomalacia

Osteomalacia involves softening of bones due to inadequate vitamin D or calcium, leading to bone pain and muscle weakness. Unlike osteoporosis, it primarily affects bone mineralization (Holick, 2007).

Myoglobin

Myoglobin is an oxygen-storing protein in muscle cells, facilitating oxygen delivery during muscle activity. It is responsible for the red color of muscle tissue and plays a critical role in muscle metabolism (Ordway & Garry, 2004).

Bursa

A bursa is a small fluid-filled sac that cushions and reduces friction near joints, tendons, and muscles. Inflammation of the bursa, called bursitis, causes pain and limited joint mobility (Cohen & Laing, 2021).

Rickets

Rickets is a childhood bone disorder due to vitamin D deficiency, leading to impaired mineralization, bone softening, and deformities such as bowed legs. Prevention involves adequate vitamin D intake and sunlight exposure (Bikle, 2012).

Degenerative Disk Disease

This condition results from wear and tear on intervertebral discs due to aging or injury, causing chronic back pain, stiffness, and reduced spinal mobility (Adams & Roughley, 2006).

Paget’s Disease

Paget’s disease is characterized by abnormal bone remodeling, with excessive breakdown followed by disorganized formation. This leads to thickened but fragile bones, commonly affecting the pelvis, spine, and skull (Ralston & Albagha, 2014).

Comminuted Fracture

A comminuted fracture occurs when the bone breaks into multiple fragments, often caused by severe trauma. Surgical intervention is usually required to stabilize the bone (Court-Brown & McQueen, 2016).

Three Types of Skin Cancer

Basal Cell Carcinoma

Basal cell carcinoma arises mainly in sun-exposed skin and appears as pearly nodules. It rarely metastasizes, and early treatment generally results in a favorable prognosis (National Cancer Institute, 2021).

Squamous Cell Carcinoma

This more aggressive skin cancer manifests as scaly, red, crusted nodules and may invade local tissues or metastasize if untreated (Karia, Han, & Schmults, 2013).

Melanoma

Melanoma is the deadliest skin cancer, characterized by irregularly shaped and pigmented lesions. Caucasian males are at the highest risk. Early detection significantly improves survival (Garbe & Leiter, 2009).

Consequences When the Integumentary System is Disrupted

Damage to the skin compromises its protective barrier, increasing vulnerability to infections, fluid loss, temperature dysregulation, and sensory impairment. Such disruptions adversely affect overall health and increase morbidity (Proksch, Brandner, & Jensen, 2008).

Types of Burns

Vitiligo

Vitiligo is an autoimmune disorder marked by loss of melanocytes, resulting in distinct white patches of skin. Though not physically harmful, it may have psychological and social impacts due to visible pigmentation loss (Ezzedine et al., 2015).

Ischemic CVA vs. Hemorrhagic CVA

Ischemic strokes cause brain tissue ischemia due to blocked blood flow, whereas hemorrhagic strokes result from bleeding, both requiring urgent care but differing in management (Meschia et al., 2014).

Subdural Hematoma

A subdural hematoma is bleeding between the dura mater and the brain caused by trauma. It raises intracranial pressure, leading to neurological symptoms such as headaches and confusion. Immediate diagnosis and treatment are critical to prevent brain damage (Bullock et al., 2006).

Alzheimer’s Disease vs. Parkinson’s Disease

Alzheimer’s primarily affects cognitive functions due to neuronal loss, while Parkinson’s affects movement control via degeneration of dopaminergic neurons (Dauer & Przedborski, 2003; Querfurth & LaFerla, 2010).

Huntington’s Disease

Huntington’s disease is a genetic neurodegenerative disorder caused by an autosomal dominant mutation. It leads to involuntary movements (chorea), cognitive decline, and psychiatric disturbances, typically presenting in mid-adulthood (Walker, 2007).

Sclerosis

Sclerosis denotes pathological tissue hardening due to excessive fibrous tissue formation, impairing normal function. It is a hallmark of diseases such as multiple sclerosis and systemic sclerosis (Gabriel & Schmidt, 2017).

Disorders That Cause Vision Loss

Early detection and treatment are essential to prevent permanent vision loss (American Academy of Ophthalmology, 2021).

Kyphosis

Kyphosis is an exaggerated forward curvature of the thoracic spine, leading to a hunched posture. Causes include poor posture, vertebral fractures, or degenerative diseases, potentially causing pain and respiratory issues (Katzman et al., 2010).

Disorders That Cause Hearing Loss

Both conditions impair hearing through different mechanisms and require appropriate management (NIDCD, 2016).

Predisposing Factors of Ischemic Stroke

Key risk factors include atrial fibrillation (which causes emboli), carotid artery stenosis from atherosclerosis, and cerebral arteriosclerosis leading to vessel narrowing. Managing these conditions reduces ischemic stroke risk (Benjamin et al., 2019).

Rheumatoid Arthritis

Rheumatoid arthritis (RA) is a chronic autoimmune disorder characterized by joint inflammation, pain, swelling, and deformity, along with systemic symptoms like fatigue. Early diagnosis and use of disease-modifying agents improve outcomes (Smolen, Aletaha, & McInnes, 2016).

Psoriasis

Study Guide Questions and Answers

Describe how your body responds to an infection

When the body encounters an infection, it triggers a sophisticated immune response aimed at neutralizing the invading pathogens. Initially, T-cells, a subset of white blood cells, release cytokines—chemical signals that orchestrate the immune response. These cytokines activate B-cells to produce antibodies, which are specialized proteins that either neutralize pathogens directly or tag them for destruction by other immune cells. This interaction between cellular immunity (T-cells) and humoral immunity (B-cells producing antibodies) is critical for eradicating infections and building immunity to prevent future attacks (Abbas, Lichtman, & Pillai, 2018).

Identify the role of DNA changes in congenital abnormalities

Congenital abnormalities, or birth defects, often result from alterations in DNA, such as mutations or chromosomal abnormalities, which disrupt normal fetal development. These genetic changes can be inherited or may occur spontaneously during cell division. Mutations may impair genes crucial for cell growth and differentiation, while chromosomal anomalies—like deletions, duplications, or translocations—cause missing or extra genetic material. Such disruptions hinder the normal formation of organs and tissues, leading to structural or functional defects noticeable at birth (Moore, Persaud, & Torchia, 2020).

How does development disrupt congenital abnormalities?

Proper embryonic and fetal development depends on tightly regulated genetic and cellular processes. Any abnormalities in DNA during these stages can interfere with gene expression, cell signaling, and differentiation. For example, failure in neural tube closure due to genetic mutations leads to conditions like spina bifida. Interruptions in these complex developmental pathways result in congenital defects that may present as anatomical malformations or functional impairments after birth (Sadler, 2019).

Describe factors that disrupt homeostasis and how disruptions affect wellbeing

Homeostasis refers to the body’s ability to maintain a stable internal environment despite external fluctuations. Factors such as dehydration, electrolyte imbalances, or fluid overload disrupt this balance and negatively affect wellbeing. For example, disturbances in sodium and potassium levels can impair nerve conduction and muscle function, causing symptoms like nausea, cramps, and arrhythmias. Prolonged disruptions may compromise organ function and lead to serious health consequences (Hall & Guyton, 2021).

Explain RAAS (Renin-Angiotensin-Aldosterone System)

The Renin-Angiotensin-Aldosterone System (RAAS) is a hormonal mechanism essential for regulating blood pressure and fluid homeostasis. When kidney blood flow drops, juxtaglomerular cells secrete renin, which converts angiotensinogen from the liver into angiotensin I. Angiotensin I is then transformed into angiotensin II by angiotensin-converting enzyme (ACE) in the lungs. Angiotensin II causes vasoconstriction, increasing blood pressure, and stimulates aldosterone secretion from the adrenal glands, which promotes sodium and water retention by the kidneys. This system helps maintain blood volume and pressure, especially during hypotension (Klabunde, 2017).

Diabetic Ketoacidosis (DKA)

Diabetic ketoacidosis is a critical complication in diabetes marked by metabolic acidosis with an elevated anion gap. It arises when insulin deficiency triggers fat breakdown, producing ketones that lower blood bicarbonate (HCO₃⁻) levels. This acidosis manifests through dehydration, rapid breathing, and altered consciousness, requiring immediate medical intervention (Kitabchi et al., 2009).

How do kidneys compensate for alkalosis?

In alkalosis, where blood pH is elevated, kidneys help restore balance by conserving hydrogen ions (H⁺) and excreting more bicarbonate (HCO₃⁻). This renal compensation gradually reduces blood alkalinity, supporting systemic pH normalization. Although slower than respiratory adjustments, renal mechanisms are crucial for long-term acid-base stability (Rose & Post, 2001).

Untreated acidosis leads to an increase in which electrolyte?

Untreated acidosis often results in hyperkalemia—elevated potassium levels in the blood. This occurs because excess hydrogen ions enter cells in exchange for potassium ions exiting into the bloodstream. Elevated potassium can provoke life-threatening cardiac arrhythmias and muscle weakness, necessitating prompt management (Adrogué & Madias, 2000).

West Nile Virus

West Nile Virus is transmitted primarily through bites from infected Culex mosquitoes. Most infections cause mild febrile illness, but in older adults or immunocompromised individuals, it may progress to severe neuroinvasive disease such as encephalitis or meningitis. Preventative measures include mosquito control and bite avoidance (Sejvar, 2014).

Lyme Disease

Lyme disease, caused by Borrelia burgdorferi transmitted via tick bites, often begins with fever, fatigue, headache, and a characteristic bull’s-eye rash (erythema migrans). If left untreated, it can lead to joint inflammation, cardiac issues, and neurological problems. Early antibiotic treatment is essential to avoid complications (Steere et al., 2016).

Erythema Infectiosum

Also known as “fifth disease,” erythema infectiosum is caused by parvovirus B19. It presents with mild fever and respiratory symptoms followed by a bright red rash on children’s cheeks, sometimes spreading to limbs and trunk. Adults may experience joint pain. It is typically mild and resolves without treatment (Heegaard & Brown, 2002).

Obesity and Diabetes as Risk Factors for Having a Child with Spina Bifida

Maternal obesity and diabetes increase the likelihood of neural tube defects like spina bifida by interfering with folate metabolism and embryonic development. Ensuring optimal maternal health and folic acid supplementation before conception can significantly lower these risks (Miller et al., 2010).

Trousseau’s Sign

Trousseau’s sign is an indicator of hypocalcemia characterized by a carpal spasm triggered when a blood pressure cuff inflates above systolic pressure, inducing nerve ischemia. This neuromuscular irritability signals low calcium levels and requires further medical evaluation (Koul et al., 2017).

Cause and Sign of Spina Bifida

Spina bifida is caused by incomplete closure of the neural tube during early embryogenesis, typically within weeks 3-4 of gestation. A key sign is a visible sac on the lower back containing protruding spinal tissues. The condition ranges from mild to severe and often includes neurological deficits (Wallingford et al., 2013).

Hemophilia is More Common in Males

Hemophilia is an X-linked recessive disorder leading to deficient clotting factors. Since males have a single X chromosome, they are more often affected, while females usually act as carriers. The disorder causes prolonged bleeding and necessitates clotting factor replacement therapy (Mannucci & Tuddenham, 2001).

Prenatal Exposure to Alcohol: ND-PAE, Decreased Brain Function, FAS

Alcohol intake during pregnancy can result in a spectrum of disorders, including Neurodevelopmental Disorder Associated with Prenatal Alcohol Exposure (ND-PAE) and Fetal Alcohol Syndrome (FAS). These conditions impair brain development, leading to cognitive, behavioral, and physical abnormalities. Abstinence from alcohol during pregnancy is crucial for prevention (May & Gossage, 2011).

Connective vs. Muscle Tissue Disorders

Describe Lupus

Lupus is a chronic autoimmune disease in which the immune system attacks healthy tissues. It typically presents with joint pain, fatigue, and a butterfly-shaped facial rash. Because it can affect multiple organs, comprehensive management by various specialists is often necessary (Tsokos, 2011).

Describe Myasthenia Gravis

Myasthenia gravis is an autoimmune disorder where antibodies target acetylcholine receptors at the neuromuscular junction, weakening muscle contraction. Symptoms include progressive muscle weakness, drooping eyelids (ptosis), double vision, and swallowing difficulties. Treatment commonly includes immunosuppressants and acetylcholinesterase inhibitors (Gilhus, 2016).

Dermatitis

Dermatitis involves skin inflammation caused by irritants or allergies, presenting as redness, itching, and sometimes blisters or scaling. Common types include contact dermatitis and atopic dermatitis (eczema), managed through trigger avoidance and symptomatic treatment (Langan et al., 2020).

Eczema

Eczema is a chronic inflammatory skin condition marked by itchy, red, sometimes blistered lesions. It often begins in childhood and may co-occur with asthma. Management emphasizes moisturizers and anti-inflammatory therapies (Weidinger & Novak, 2016).

Decubitus Ulcer

Decubitus ulcers, or pressure sores, develop from prolonged pressure over bony areas in immobile patients, leading to skin breakdown and possible infection. Prevention and treatment focus on pressure relief and wound care (National Pressure Injury Advisory Panel, 2019).

Fungal Infections

Fungal infections range from superficial (e.g., athlete’s foot) to systemic, caused by pathogenic fungi. They spread through various modes and require antifungal medications for treatment (Kauffman, 2006).

Benign Neoplasm

Benign neoplasms are localized, non-cancerous growths with smooth, defined edges. They grow slowly and do not invade or metastasize but may cause symptoms by compressing nearby tissues (Weinberg, 2014).

Malignant Neoplasm

Malignant neoplasms (cancers) exhibit uncontrolled growth with irregular borders, invade surrounding tissues, and can metastasize, posing serious health threats. Treatment includes surgery, chemotherapy, and radiation (Hanahan & Weinberg, 2011).

Osteoporosis

Osteoporosis is characterized by decreased bone density, leading to fragile bones prone to fractures. It is common in aging, especially postmenopausal women due to estrogen loss. Prevention includes calcium, vitamin D, and exercise (NIH Osteoporosis and Related Bone Diseases National Resource Center, 2018).

Osteomalacia

Osteomalacia involves bone softening due to insufficient calcium or vitamin D, causing bone pain and muscle weakness. Unlike osteoporosis, it mainly affects bone mineralization (Holick, 2007).

Myoglobin

Myoglobin is an oxygen-binding protein in muscle cells, storing and releasing oxygen to support muscle metabolism during activity. It imparts the red color to muscles (Ordway & Garry, 2004).

Bursa

A bursa is a small fluid-filled sac near joints that reduces friction during movement. Inflammation of a bursa, bursitis, causes pain and limited mobility (Cohen & Laing, 2021).

Rickets

Rickets is a childhood bone disorder caused by vitamin D deficiency, resulting in soft, weak, and deformed bones, such as bowed legs. Prevention involves sufficient dietary vitamin D and sunlight (Bikle, 2012).

Degenerative Disk Disease

Degenerative disk disease is a condition marked by the breakdown of intervertebral discs due to aging or injury, leading to chronic back pain and reduced mobility (Adams & Roughley, 2006).

Paget’s Disease

Paget’s disease involves abnormal bone remodeling, with excessive breakdown followed by disorganized formation, producing thick yet fragile bones, often affecting the pelvis, spine, and skull (Ralston & Albagha, 2014).

Comminuted Fracture

A comminuted fracture is a bone break where the bone fragments into multiple pieces, often from high-impact trauma, typically requiring surgical repair (Court-Brown & McQueen, 2016).

Three Types of Skin Cancer

Basal Cell Carcinoma

Basal cell carcinoma is the most frequent skin cancer, appearing as pearly nodules in sun-exposed areas. It rarely metastasizes, and early treatment yields excellent prognosis (National Cancer Institute, 2021).

Squamous Cell Carcinoma

Squamous cell carcinoma is more aggressive, presenting as scaly, crusted nodules. It can invade local tissues and metastasize if untreated (Karia, Han, & Schmults, 2013).

Melanoma

Melanoma is the deadliest skin cancer, often seen as irregular, dark pigmented lesions, with Caucasian males at highest risk. Early detection significantly improves survival (Garbe & Leiter, 2009).

Consequences When the Integumentary System is Disrupted

Damage to the skin compromises its barrier, increasing infection risk, fluid loss, temperature regulation problems, and sensory impairment, adversely affecting health (Proksch, Brandner, & Jensen, 2008).

Types of Burns

Vitiligo

Vitiligo is characterized by autoimmune destruction of melanocytes, leading to white, depigmented skin patches. It affects psychological wellbeing despite not causing physical harm (Ezzedine et al., 2015).

Ischemic CVA vs. Hemorrhagic CVA

Ischemic strokes occur due to obstruction causing ischemia, whereas hemorrhagic strokes result from bleeding damaging brain tissue. Treatments differ accordingly (Meschia et al., 2014).

Subdural Hematoma

Subdural hematoma is the accumulation of blood between the dura mater and brain following trauma. It increases intracranial pressure, causing headaches, confusion, and neurological deficits, requiring urgent treatment (Bullock et al., 2006).

Alzheimer’s Disease vs. Parkinson’s Disease

Alzheimer’s disease affects cognition through neuronal loss, while Parkinson’s disease primarily impacts motor function due to dopaminergic neuron degeneration (Dauer & Przedborski, 2003; Querfurth & LaFerla, 2010).

Huntington’s Disease

Huntington’s disease is an autosomal dominant neurodegenerative disorder presenting with involuntary movements (chorea), cognitive decline, and psychiatric symptoms, usually starting in mid-adulthood (Walker, 2007).

Sclerosis

Sclerosis refers to the abnormal hardening or thickening of tissues from excessive fibrous tissue formation, impairing function. It is common in diseases like multiple sclerosis and systemic sclerosis (Gabriel & Schmidt, 2017).

Disorders That Cause Vision Loss

Early detection is critical to prevent permanent vision loss (American Academy of Ophthalmology, 2021).

Kyphosis

Kyphosis is an exaggerated forward curvature of the thoracic spine causing a hunched back. It results from poor posture, fractures, or degeneration, and can cause pain and breathing difficulties (Katzman et al., 2010).

Disorders That Cause Hearing Loss

Meniere’s disease causes fluctuating hearing loss and vertigo from inner ear fluid imbalance. Otitis media causes hearing impairment due to middle ear infection and fluid buildup (NIDCD, 2016).

Predisposing Factors of Ischemic Stroke

Factors increasing ischemic stroke risk include atrial fibrillation (causing emboli), carotid artery stenosis, and cerebral arteriosclerosis. Managing these reduces stroke incidence (Benjamin et al., 2019).

Rheumatoid Arthritis

Rheumatoid arthritis is a chronic autoimmune disease characterized by joint inflammation, pain, swelling, and deformities, often with systemic symptoms like fatigue. Early treatment with disease-modifying drugs improves outcomes (Smolen, Aletaha, & McInnes, 2016).

Psoriasis

Psoriasis is an autoimmune skin disorder with rapid skin cell turnover, producing red, scaly plaques on scalp, elbows, and knees. It can also cause psoriatic arthritis (Griffiths & Barker, 2007).

Sexually Transmitted Diseases and Disorders

Early diagnosis and treatment are crucial to prevent spread and complications (CDC, 2023).

References

Abbas, A. K., Lichtman, A. H., & Pillai, S. (2018). Cellular and Molecular Immunology (9th ed.). Elsevier.

Adams, M. A., & Roughley, P. J. (2006). What is intervertebral disc degeneration, and what causes it? Spine, 31(18), 2151-2161.

Adrogué, H. J., & Madias, N. E. (2000). Hyperkalemia. New England Journal of Medicine, 342(12), 904-911.

American Academy of Ophthalmology. (2021). Common eye diseases and conditions.

Benjamin, E. J., et al. (2019). Heart disease and stroke statistics—2019 update. Circulation, 139(10), e56-e528.

Bikle, D. D. (2012). Vitamin D and bone. Current Osteoporosis Reports, 10(2), 151-159.

D236 Test Bank: Key Questions & Answers Guide

Bullock, M. R., et al. (2006). Surgical management of acute subdural hematomas. Neurosurgery, 58(3 Suppl), S2-10.

CDC. (2023). Sexually transmitted infections treatment guidelines.

Cohen, S. P., & Laing, A. (2021). Bursitis: Pathophysiology, clinical presentation, and diagnosis. BMJ, 375.

Dauer, W., & Przedborski, S. (2003). Parkinson’s disease: