NUR 631 ADVANCED PHYSIOLOGY AND
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
AND ANSWERS 100% VERIFIED BY
EXPERTS. 2026/2027
1. Which process describes the movement of fluid from the capillaries into the interstitial
space due to hydrostatic pressure?
A. Osmosis
B. Diffusion
C. Active Transport
D. Filtration
Answer: D
Conceptual Explanation: Filtration is the process where fluid moves across a membrane
from an area of higher pressure to lower pressure, specifically capillary hydrostatic
pressure pushing fluid out.
2. In compensatory metabolic acidosis, how do the lungs respond to decrease the acidity of
the blood?
A. Hypoventilation to retain CO2
,B. Increased bicarbonate secretion
C. Hyperventilation to blow off CO2
D. Decreased tidal volume
Answer: C
Conceptual Explanation: Kussmaul respirations (hyperventilation) occur to reduce PCO2
levels, which helps increase the pH toward normal.
3. Which electrolyte imbalance is most commonly associated with the potentiation of digoxin
toxicity?
A. Hypernatremia
B. Hypomagnesemia
C. Hypercalcemia
D. Hypokalemia
Answer: D
Conceptual Explanation: Hypokalemia increases the sensitivity of the myocardium to
digoxin, as potassium and digoxin compete for binding sites on the Na+/K+ ATPase pump.
4. A patient is diagnosed with Graves’ disease. What is the underlying pathophysiology of this
Type II hypersensitivity reaction?
A. IgE-mediated mast cell degranulation
B. Immune complex deposition in the thyroid
, C. Autoantibodies binding to TSH receptors, causing overstimulation
D. T-cell mediated destruction of thyroid follicular cells
Answer: C
Conceptual Explanation: Graves’ disease involves thyroid-stimulating immunoglobulins
(TSI) that mimic TSH, leading to excessive thyroid hormone production.
5. Which cellular adaptation is characterized by the replacement of one mature cell type with
another, often due to chronic irritation?
A. Hyperplasia
B. Dysplasia
C. Metaplasia
D. Hypertrophy
Answer: C
Conceptual Explanation: Metaplasia is a reversible replacement of one mature cell type
by another, such as columnar epithelium changing to squamous epithelium in smokers’
airways.
6. What is the primary physiological function of the hormone Aldosterone?
A. Excretion of sodium and retention of potassium
B. Retention of sodium and water, and excretion of potassium
C. Regulation of serum calcium levels
PATHOPHYSIOLOGY
COMPREHENSIVE EXAM QUESTIONS
AND ANSWERS 100% VERIFIED BY
EXPERTS. 2026/2027
1. Which process describes the movement of fluid from the capillaries into the interstitial
space due to hydrostatic pressure?
A. Osmosis
B. Diffusion
C. Active Transport
D. Filtration
Answer: D
Conceptual Explanation: Filtration is the process where fluid moves across a membrane
from an area of higher pressure to lower pressure, specifically capillary hydrostatic
pressure pushing fluid out.
2. In compensatory metabolic acidosis, how do the lungs respond to decrease the acidity of
the blood?
A. Hypoventilation to retain CO2
,B. Increased bicarbonate secretion
C. Hyperventilation to blow off CO2
D. Decreased tidal volume
Answer: C
Conceptual Explanation: Kussmaul respirations (hyperventilation) occur to reduce PCO2
levels, which helps increase the pH toward normal.
3. Which electrolyte imbalance is most commonly associated with the potentiation of digoxin
toxicity?
A. Hypernatremia
B. Hypomagnesemia
C. Hypercalcemia
D. Hypokalemia
Answer: D
Conceptual Explanation: Hypokalemia increases the sensitivity of the myocardium to
digoxin, as potassium and digoxin compete for binding sites on the Na+/K+ ATPase pump.
4. A patient is diagnosed with Graves’ disease. What is the underlying pathophysiology of this
Type II hypersensitivity reaction?
A. IgE-mediated mast cell degranulation
B. Immune complex deposition in the thyroid
, C. Autoantibodies binding to TSH receptors, causing overstimulation
D. T-cell mediated destruction of thyroid follicular cells
Answer: C
Conceptual Explanation: Graves’ disease involves thyroid-stimulating immunoglobulins
(TSI) that mimic TSH, leading to excessive thyroid hormone production.
5. Which cellular adaptation is characterized by the replacement of one mature cell type with
another, often due to chronic irritation?
A. Hyperplasia
B. Dysplasia
C. Metaplasia
D. Hypertrophy
Answer: C
Conceptual Explanation: Metaplasia is a reversible replacement of one mature cell type
by another, such as columnar epithelium changing to squamous epithelium in smokers’
airways.
6. What is the primary physiological function of the hormone Aldosterone?
A. Excretion of sodium and retention of potassium
B. Retention of sodium and water, and excretion of potassium
C. Regulation of serum calcium levels
