WGU D115 Advanced Pathophysiology
OA: Complete Practice Question Bank
with verified Answers (Questions 1-300)
GOOD LUCK!!
1. A client with longstanding hypertension develops left ventricular
hypertrophy. Which cellular adaptation best explains this change?
Answer: Hypertrophy. Hypertrophy is an increase in cell size in response to increased
workload. Cardiac muscle cells have a limited ability to undergo hyperplasia, so they
compensate by enlarging.
2. A client experiences prolonged myocardial ischemia resulting in irreversible
injury and cell membrane rupture. Which type of cellular death has most likely
occurred?
Answer: Necrosis. Necrosis results from irreversible cellular injury and is
characterized by cell swelling, membrane rupture, and an accompanying
inflammatory response.
3. Which of the following best describes the difference between necrosis and
apoptosis?
Answer: Necrosis is uncontrolled and triggers inflammation; apoptosis is
programmed and does not trigger inflammation. Apoptosis is a regulated, energy-
dependent process of programmed cell death, whereas necrosis is unregulated and
pathological.
4. Which immune cells are primarily responsible for producing antibodies?
Answer: B lymphocytes. Activated B lymphocytes differentiate into plasma cells that
secrete antibodies, which is the basis of humoral immunity.
5. A patient is experiencing a severe allergic reaction to penicillin. Which type
of hypersensitivity reaction is this?
Answer: Type I (anaphylactic). Penicillin allergy is a Type I hypersensitivity reaction
mediated by IgE antibodies that bind to mast cells and basophils, causing
degranulation and release of histamine.
6. A client develops septic shock from a severe bacterial infection. Which
pathophysiological event contributes most directly to hypotension?
Answer: Generalized vasodilation and increased capillary permeability. Inflammatory
,mediators in sepsis cause widespread vasodilation and capillary leakage, leading to
hypotension and poor tissue perfusion.
7. A client is diagnosed with an autoimmune disorder. Which
pathophysiological mechanism best explains this?
Answer: Failure of self-tolerance resulting in immune attack against self-antigens.
Autoimmune disorders occur when immune tolerance mechanisms fail, leading the
immune system to attack normal tissues.
8. A patient with severe hypovolemia develops tachycardia. Which
compensatory mechanism primarily causes the increased heart rate?
Answer: Sympathetic nervous system activation. Sympathetic stimulation increases
heart rate and contractility to maintain cardiac output in the setting of low blood
volume.
9. A patient with chronic obstructive pulmonary disease (COPD) develops right-
sided heart failure. Which cellular adaptation likely occurred in the heart?
Answer: Hypertrophy. The right ventricle undergoes hypertrophy in response to
increased workload caused by pulmonary hypertension from chronic hypoxemia.
10. A patient with an inherited disorder has one affected parent and each child
has approximately a 50% risk of inheriting the disease. Which inheritance
pattern is most likely?
Answer: Autosomal dominant. Autosomal dominant disorders often affect successive
generations and carry a 50% transmission risk from an affected parent.
11. A patient inherits one mutated allele for a disease-causing gene but does
not express the disorder because a normal allele is present. Which inheritance
pattern best describes this?
Answer: Autosomal recessive. Autosomal recessive disorders require two mutated
alleles for disease expression. A single mutated allele makes the person a carrier.
12. A client with metabolic acidosis develops rapid, deep respirations. This
compensatory response occurs because the respiratory system is attempting to
do what?
Answer: Eliminate carbon dioxide and reduce acidity. Hyperventilation decreases
carbon dioxide levels, reducing hydrogen ion concentration and partially
compensating for metabolic acidosis.
13. A client develops generalized edema due to congestive heart failure. Which
pathophysiological mechanism is primarily responsible?
Answer: Increased capillary hydrostatic pressure. Heart failure elevates venous
pressures, increasing hydrostatic pressure within capillaries and forcing fluid into the
interstitial tissues.
,14. A patient with chronic inflammation demonstrates elevated ESR and CRP
levels. These findings indicate what?
Answer: Increased acute-phase protein production. Inflammatory cytokines like
interleukin-6 stimulate the liver to produce acute-phase reactants, which are non-
specific markers of inflammation.
15. Multiple Sclerosis is primarily characterized by what pathophysiological
process?
Answer: Chronic inflammation, demyelination, and scarring in the central nervous
system. Multiple sclerosis is an autoimmune disease that attacks the myelin sheath of
neurons in the brain and spinal cord.
16. Which of the following is an example of a chromosomal abnormality?
Answer: Down syndrome (trisomy 21). Down syndrome is caused by an extra copy of
chromosome 21, which is a numerical chromosomal abnormality.
17. Describe the underlying mechanism that leads to the symptoms of diabetes
insipidus.
Answer: Deficiency of the hormone vasopressin (ADH), leading to an inability to
concentrate urine. This causes excessive thirst (polydipsia) and excessive urination
(polyuria).
18. Tachycardia in the setting of heart failure occurs due to what compensatory
mechanism?
Answer: Release of catecholamines. The sympathetic nervous system is activated to
release epinephrine and norepinephrine, which increase heart rate to compensate for
reduced cardiac output.
19. What is the most common symptom of cholecystitis?
Answer: Right upper quadrant (RUQ) pain. Gallbladder inflammation typically
presents with steady, severe pain in the right upper quadrant or epigastric region.
20. A patient is diagnosed with cervical dysplasia following a Pap smear. This
cellular change is best described as what?
Answer: Dysplasia. Dysplasia is characterized by abnormal cellular growth, size, and
organization, often representing a pre-cancerous change.
21. A patient with chronic gastroesophageal reflux disease develops
replacement of normal esophageal squamous cells with columnar epithelium.
Which cellular adaptation has occurred?
Answer: Metaplasia. Metaplasia is the reversible substitution of one mature cell type
for another in response to chronic irritation, such as acid reflux.
, 22. Huntington's disease is characterized by which type of genetic mutation?
Answer: Trinucleotide repeat expansion. Huntington's disease is caused by an
expansion of CAG trinucleotide repeats in the HTT gene.
23. What does the BRCA1 genetic marker indicate in relation to health?
Answer: Increased risk of breast and ovarian cancer. BRCA1 is a tumor suppressor
gene; mutations in this gene increase the lifetime risk of developing breast and
ovarian cancers.
24. A patient with familial hypercholesterolemia has elevated LDL cholesterol
levels. This condition is inherited in which pattern?
Answer: Autosomal dominant. Familial hypercholesterolemia is an autosomal
dominant disorder caused by mutations in the LDL receptor gene.
25. A client's fever and leukocytosis following a bacterial infection is primarily
mediated by which substance?
Answer: Interleukin-1. Interleukin-1 is a proinflammatory cytokine that stimulates
prostaglandin production and increases the hypothalamic temperature set point,
causing fever.
26. A patient with an autoimmune disorder produces antibodies against thyroid
tissue. Which immune mechanism most likely failed?
Answer: Self-tolerance recognition. Autoimmune diseases develop when immune
cells fail to distinguish self from non-self antigens.
27. Define Turner's Syndrome.
Answer: A chromosomal defect causing developmental abnormalities and infertility.
Turner syndrome is caused by a missing or partially missing X chromosome in
females (45,XO).
28. Where does an empyema occur?
Answer: In the pleura. An empyema is a collection of pus in the pleural space, usually
as a complication of pneumonia or lung infection.
29. What is the primary characteristic of diabetes insipidus?
Answer: Excessive thirst and urination. This is due to a deficiency of or resistance to
ADH (vasopressin), leading to the excretion of large volumes of dilute urine.
30. A 38-year-old primigravida is scheduled for an amniocentesis at 16 weeks
gestation. The purpose of this procedure is to do what?
Answer: Perform genetic studies. Amniocentesis allows for the collection of fetal
cells to perform chromosomal analysis, useful for detecting conditions like Down
syndrome.
OA: Complete Practice Question Bank
with verified Answers (Questions 1-300)
GOOD LUCK!!
1. A client with longstanding hypertension develops left ventricular
hypertrophy. Which cellular adaptation best explains this change?
Answer: Hypertrophy. Hypertrophy is an increase in cell size in response to increased
workload. Cardiac muscle cells have a limited ability to undergo hyperplasia, so they
compensate by enlarging.
2. A client experiences prolonged myocardial ischemia resulting in irreversible
injury and cell membrane rupture. Which type of cellular death has most likely
occurred?
Answer: Necrosis. Necrosis results from irreversible cellular injury and is
characterized by cell swelling, membrane rupture, and an accompanying
inflammatory response.
3. Which of the following best describes the difference between necrosis and
apoptosis?
Answer: Necrosis is uncontrolled and triggers inflammation; apoptosis is
programmed and does not trigger inflammation. Apoptosis is a regulated, energy-
dependent process of programmed cell death, whereas necrosis is unregulated and
pathological.
4. Which immune cells are primarily responsible for producing antibodies?
Answer: B lymphocytes. Activated B lymphocytes differentiate into plasma cells that
secrete antibodies, which is the basis of humoral immunity.
5. A patient is experiencing a severe allergic reaction to penicillin. Which type
of hypersensitivity reaction is this?
Answer: Type I (anaphylactic). Penicillin allergy is a Type I hypersensitivity reaction
mediated by IgE antibodies that bind to mast cells and basophils, causing
degranulation and release of histamine.
6. A client develops septic shock from a severe bacterial infection. Which
pathophysiological event contributes most directly to hypotension?
Answer: Generalized vasodilation and increased capillary permeability. Inflammatory
,mediators in sepsis cause widespread vasodilation and capillary leakage, leading to
hypotension and poor tissue perfusion.
7. A client is diagnosed with an autoimmune disorder. Which
pathophysiological mechanism best explains this?
Answer: Failure of self-tolerance resulting in immune attack against self-antigens.
Autoimmune disorders occur when immune tolerance mechanisms fail, leading the
immune system to attack normal tissues.
8. A patient with severe hypovolemia develops tachycardia. Which
compensatory mechanism primarily causes the increased heart rate?
Answer: Sympathetic nervous system activation. Sympathetic stimulation increases
heart rate and contractility to maintain cardiac output in the setting of low blood
volume.
9. A patient with chronic obstructive pulmonary disease (COPD) develops right-
sided heart failure. Which cellular adaptation likely occurred in the heart?
Answer: Hypertrophy. The right ventricle undergoes hypertrophy in response to
increased workload caused by pulmonary hypertension from chronic hypoxemia.
10. A patient with an inherited disorder has one affected parent and each child
has approximately a 50% risk of inheriting the disease. Which inheritance
pattern is most likely?
Answer: Autosomal dominant. Autosomal dominant disorders often affect successive
generations and carry a 50% transmission risk from an affected parent.
11. A patient inherits one mutated allele for a disease-causing gene but does
not express the disorder because a normal allele is present. Which inheritance
pattern best describes this?
Answer: Autosomal recessive. Autosomal recessive disorders require two mutated
alleles for disease expression. A single mutated allele makes the person a carrier.
12. A client with metabolic acidosis develops rapid, deep respirations. This
compensatory response occurs because the respiratory system is attempting to
do what?
Answer: Eliminate carbon dioxide and reduce acidity. Hyperventilation decreases
carbon dioxide levels, reducing hydrogen ion concentration and partially
compensating for metabolic acidosis.
13. A client develops generalized edema due to congestive heart failure. Which
pathophysiological mechanism is primarily responsible?
Answer: Increased capillary hydrostatic pressure. Heart failure elevates venous
pressures, increasing hydrostatic pressure within capillaries and forcing fluid into the
interstitial tissues.
,14. A patient with chronic inflammation demonstrates elevated ESR and CRP
levels. These findings indicate what?
Answer: Increased acute-phase protein production. Inflammatory cytokines like
interleukin-6 stimulate the liver to produce acute-phase reactants, which are non-
specific markers of inflammation.
15. Multiple Sclerosis is primarily characterized by what pathophysiological
process?
Answer: Chronic inflammation, demyelination, and scarring in the central nervous
system. Multiple sclerosis is an autoimmune disease that attacks the myelin sheath of
neurons in the brain and spinal cord.
16. Which of the following is an example of a chromosomal abnormality?
Answer: Down syndrome (trisomy 21). Down syndrome is caused by an extra copy of
chromosome 21, which is a numerical chromosomal abnormality.
17. Describe the underlying mechanism that leads to the symptoms of diabetes
insipidus.
Answer: Deficiency of the hormone vasopressin (ADH), leading to an inability to
concentrate urine. This causes excessive thirst (polydipsia) and excessive urination
(polyuria).
18. Tachycardia in the setting of heart failure occurs due to what compensatory
mechanism?
Answer: Release of catecholamines. The sympathetic nervous system is activated to
release epinephrine and norepinephrine, which increase heart rate to compensate for
reduced cardiac output.
19. What is the most common symptom of cholecystitis?
Answer: Right upper quadrant (RUQ) pain. Gallbladder inflammation typically
presents with steady, severe pain in the right upper quadrant or epigastric region.
20. A patient is diagnosed with cervical dysplasia following a Pap smear. This
cellular change is best described as what?
Answer: Dysplasia. Dysplasia is characterized by abnormal cellular growth, size, and
organization, often representing a pre-cancerous change.
21. A patient with chronic gastroesophageal reflux disease develops
replacement of normal esophageal squamous cells with columnar epithelium.
Which cellular adaptation has occurred?
Answer: Metaplasia. Metaplasia is the reversible substitution of one mature cell type
for another in response to chronic irritation, such as acid reflux.
, 22. Huntington's disease is characterized by which type of genetic mutation?
Answer: Trinucleotide repeat expansion. Huntington's disease is caused by an
expansion of CAG trinucleotide repeats in the HTT gene.
23. What does the BRCA1 genetic marker indicate in relation to health?
Answer: Increased risk of breast and ovarian cancer. BRCA1 is a tumor suppressor
gene; mutations in this gene increase the lifetime risk of developing breast and
ovarian cancers.
24. A patient with familial hypercholesterolemia has elevated LDL cholesterol
levels. This condition is inherited in which pattern?
Answer: Autosomal dominant. Familial hypercholesterolemia is an autosomal
dominant disorder caused by mutations in the LDL receptor gene.
25. A client's fever and leukocytosis following a bacterial infection is primarily
mediated by which substance?
Answer: Interleukin-1. Interleukin-1 is a proinflammatory cytokine that stimulates
prostaglandin production and increases the hypothalamic temperature set point,
causing fever.
26. A patient with an autoimmune disorder produces antibodies against thyroid
tissue. Which immune mechanism most likely failed?
Answer: Self-tolerance recognition. Autoimmune diseases develop when immune
cells fail to distinguish self from non-self antigens.
27. Define Turner's Syndrome.
Answer: A chromosomal defect causing developmental abnormalities and infertility.
Turner syndrome is caused by a missing or partially missing X chromosome in
females (45,XO).
28. Where does an empyema occur?
Answer: In the pleura. An empyema is a collection of pus in the pleural space, usually
as a complication of pneumonia or lung infection.
29. What is the primary characteristic of diabetes insipidus?
Answer: Excessive thirst and urination. This is due to a deficiency of or resistance to
ADH (vasopressin), leading to the excretion of large volumes of dilute urine.
30. A 38-year-old primigravida is scheduled for an amniocentesis at 16 weeks
gestation. The purpose of this procedure is to do what?
Answer: Perform genetic studies. Amniocentesis allows for the collection of fetal
cells to perform chromosomal analysis, useful for detecting conditions like Down
syndrome.
