NR 507 Final Exam: Advanced Pathophysiology V1 -
Chamberlain University Updated and Latest Questions and
Correct Answers with Rationale
1. Which type of hypersensitivity reaction is mediated by IgE antibodies and results in immediate mast cell
degranulation?
A. Type I
B. Type II
C. Type III
D. Type IV
Ans: A
Explanation: Type I hypersensitivity is an immediate allergic reaction involving IgE binding to mast
cells. This interaction triggers the release of histamine and other inflammatory mediators into the tissues.
Common examples include hay fever, asthma, and systemic anaphylaxis. It is characterized by a rapid
onset often occurring within minutes of exposure. Understanding this mechanism is vital for managing
acute allergic emergencies in clinical practice.
2. What is the primary cause of edema in a patient with nephrotic syndrome?
A. Increased capillary hydrostatic pressure
B. Increased capillary permeability
C. Obstruction of the lymphatic system
D. Loss of plasma proteins like albumin
Ans: D
,Explanation: Nephrotic syndrome involves significant glomerular damage that leads to heavy
proteinuria. The loss of albumin reduces the oncotic pressure within the vascular compartment. This
reduction allows fluid to leak from the capillaries into the interstitial spaces. Consequently, the patient
develops generalized edema as a result of low serum protein. Clinicians must monitor protein levels
closely to manage these fluid shifts effectively.
3. In the development of atherosclerosis, which cell type takes up oxidized LDL to become ‘foam cells’?
A. Macrophages
B. Neutrophils
C. Endothelial cells
D. Smooth muscle cells
Ans: A
Explanation: Atherosclerosis begins with endothelial injury followed by the accumulation of lipids in the
vessel wall. Macrophages migrate to the site of injury and ingest oxidized low-density lipoproteins. Once
filled with lipids, these macrophages are referred to as foam cells. These foam cells form the fatty streak,
which is the earliest visible lesion of atherosclerosis. This process eventually leads to plaque formation
and potential vascular occlusion.
4. Which hormone is primarily responsible for the reabsorption of water in the distal convoluted tubule and
collecting duct?
A. Aldosterone
B. Atrial natriuretic peptide
C. Antidiuretic hormone (ADH)
D. Renin
, Ans: C
Explanation: Antidiuretic hormone is synthesized in the hypothalamus and released by the posterior
pituitary. It acts on the kidneys to increase the permeability of the collecting ducts to water. By inserting
aquaporins, it allows more water to be reabsorbed back into the blood. This mechanism is essential for
maintaining fluid balance and regulating blood pressure. A deficiency in this hormone can lead to
conditions such as diabetes insipidus.
5. What is the hallmark clinical manifestation of right-sided heart failure?
A. Pulmonary edema
B. Orthopnea
C. Dyspnea on exertion
D. Peripheral edema
Ans: D
Explanation: Right-sided heart failure occurs when the right ventricle cannot effectively pump blood
into the pulmonary circulation. This leads to a backup of blood into the systemic venous system. The
increased venous pressure results in fluid leaking into the tissues, causing peripheral edema. Patients
may also exhibit jugular venous distention and hepatomegaly due to systemic congestion. This condition
differs from left-sided failure, which primarily impacts the lungs.
6. Which type of anemia is characterized by large, abnormally shaped erythrocytes and is often caused by
Vitamin B12 deficiency?
A. Pernicious anemia
B. Microcytic anemia
C. Iron deficiency anemia
Chamberlain University Updated and Latest Questions and
Correct Answers with Rationale
1. Which type of hypersensitivity reaction is mediated by IgE antibodies and results in immediate mast cell
degranulation?
A. Type I
B. Type II
C. Type III
D. Type IV
Ans: A
Explanation: Type I hypersensitivity is an immediate allergic reaction involving IgE binding to mast
cells. This interaction triggers the release of histamine and other inflammatory mediators into the tissues.
Common examples include hay fever, asthma, and systemic anaphylaxis. It is characterized by a rapid
onset often occurring within minutes of exposure. Understanding this mechanism is vital for managing
acute allergic emergencies in clinical practice.
2. What is the primary cause of edema in a patient with nephrotic syndrome?
A. Increased capillary hydrostatic pressure
B. Increased capillary permeability
C. Obstruction of the lymphatic system
D. Loss of plasma proteins like albumin
Ans: D
,Explanation: Nephrotic syndrome involves significant glomerular damage that leads to heavy
proteinuria. The loss of albumin reduces the oncotic pressure within the vascular compartment. This
reduction allows fluid to leak from the capillaries into the interstitial spaces. Consequently, the patient
develops generalized edema as a result of low serum protein. Clinicians must monitor protein levels
closely to manage these fluid shifts effectively.
3. In the development of atherosclerosis, which cell type takes up oxidized LDL to become ‘foam cells’?
A. Macrophages
B. Neutrophils
C. Endothelial cells
D. Smooth muscle cells
Ans: A
Explanation: Atherosclerosis begins with endothelial injury followed by the accumulation of lipids in the
vessel wall. Macrophages migrate to the site of injury and ingest oxidized low-density lipoproteins. Once
filled with lipids, these macrophages are referred to as foam cells. These foam cells form the fatty streak,
which is the earliest visible lesion of atherosclerosis. This process eventually leads to plaque formation
and potential vascular occlusion.
4. Which hormone is primarily responsible for the reabsorption of water in the distal convoluted tubule and
collecting duct?
A. Aldosterone
B. Atrial natriuretic peptide
C. Antidiuretic hormone (ADH)
D. Renin
, Ans: C
Explanation: Antidiuretic hormone is synthesized in the hypothalamus and released by the posterior
pituitary. It acts on the kidneys to increase the permeability of the collecting ducts to water. By inserting
aquaporins, it allows more water to be reabsorbed back into the blood. This mechanism is essential for
maintaining fluid balance and regulating blood pressure. A deficiency in this hormone can lead to
conditions such as diabetes insipidus.
5. What is the hallmark clinical manifestation of right-sided heart failure?
A. Pulmonary edema
B. Orthopnea
C. Dyspnea on exertion
D. Peripheral edema
Ans: D
Explanation: Right-sided heart failure occurs when the right ventricle cannot effectively pump blood
into the pulmonary circulation. This leads to a backup of blood into the systemic venous system. The
increased venous pressure results in fluid leaking into the tissues, causing peripheral edema. Patients
may also exhibit jugular venous distention and hepatomegaly due to systemic congestion. This condition
differs from left-sided failure, which primarily impacts the lungs.
6. Which type of anemia is characterized by large, abnormally shaped erythrocytes and is often caused by
Vitamin B12 deficiency?
A. Pernicious anemia
B. Microcytic anemia
C. Iron deficiency anemia
