NR507 Final Exam Advanced Pathophysiology Final Exam Review -
Questions and Answers and Explanations | Latest Chamberlain
1. Which hormone is primarily responsible for the conservation of water in the
kidneys by increasing the permeability of the distal tubule and collecting duct?
• A. Aldosterone
• B. Antidiuretic Hormone (ADH)
• C. Atrial Natriuretic Peptide
• D. Renin
Answer: B
Explanation: Antidiuretic hormone (ADH), also known as vasopressin, acts on the distal
tubules and collecting ducts of the kidneys to increase water reabsorption.
2. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary
role of Angiotensin II?
• A. To stimulate the release of erythropoietin
• B. To cause systemic vasoconstriction and stimulate aldosterone release
• C. To inhibit the conversion of Angiotensin I
• D. To decrease peripheral vascular resistance
Answer: B
,Explanation: Angiotensin II is a potent vasoconstrictor and also stimulates the adrenal
cortex to release aldosterone, which increases sodium and water retention.
3. A patient with chronic kidney disease (CKD) often develops anemia. What is
the primary pathophysiological mechanism for this?
• A. Loss of iron through the urine
• B. Destruction of red blood cells by urea
• C. Vitamin B12 deficiency due to dietary restrictions
• D. Inadequate production of erythropoietin
Answer: D
Explanation: The kidneys produce erythropoietin in response to hypoxia; in CKD, the
damaged kidneys cannot produce sufficient amounts, leading to decreased red blood cell
production.
4. Which of the following is a characteristic feature of Type 1 Diabetes Mellitus?
• A. Insulin resistance in peripheral tissues
• B. Immune-mediated destruction of pancreatic beta cells
• C. Overproduction of insulin by beta cells
• D. Decreased glucose production by the liver
Answer: B
Explanation: Type 1 DM is characterized by an autoimmune destruction of the beta cells in
the pancreas, leading to an absolute insulin deficiency.
,5. What is the pathophysiological hallmark of Myasthenia Gravis?
• A. Degeneration of the myelin sheath in the CNS
• B. Destruction of acetylcholine receptors at the neuromuscular junction
• C. Loss of dopaminergic neurons in the substantia nigra
• D. Accumulation of amyloid plaques in the brain
Answer: B
Explanation: Myasthenia Gravis is an autoimmune disease where antibodies block or
destroy acetylcholine receptors at the neuromuscular junction, causing muscle weakness.
6. Which type of hypersensitivity reaction is involved in a systemic allergic
reaction to a bee sting (anaphylaxis)?
• A. Type III (Immune complex)
• B. Type II (Cytotoxic)
• C. Type I (IgE-mediated)
• D. Type IV (Delayed-type)
Answer: C
Explanation: Type I hypersensitivity involves IgE antibodies binding to mast cells, which
release histamine upon re-exposure to the allergen.
7. In Heart Failure, the release of Brain Natriuretic Peptide (BNP) is triggered by:
• A. Low cardiac output
• B. Sympathetic nervous system activation
, • C. Ventricular wall stretch due to increased volume
• D. Decreased renal perfusion
Answer: C
Explanation: BNP is secreted by the ventricles in response to increased pressure and
volume (stretch), acting as a natural diuretic and vasodilator to reduce workload.
8. Which of the following describes the pathophysiology of emphysema?
• A. Hypersecretion of mucus and chronic productive cough
• B. Reversible bronchospasm caused by environmental triggers
• C. Infection and inflammation of the pleural space
• D. Destruction of alveolar walls and loss of elastic recoil
Answer: D
Explanation: Emphysema is characterized by the permanent enlargement of gas-exchange
airways and destruction of alveolar walls, primarily due to an imbalance between
proteases and antiproteases.
9. What is the primary cause of ascites in patients with liver cirrhosis?
• A. Decreased production of bile salts
• B. Increased systemic blood pressure
• C. Decreased oncotic pressure due to hypoalbuminemia
• D. Excessive intake of sodium
Answer: C
Questions and Answers and Explanations | Latest Chamberlain
1. Which hormone is primarily responsible for the conservation of water in the
kidneys by increasing the permeability of the distal tubule and collecting duct?
• A. Aldosterone
• B. Antidiuretic Hormone (ADH)
• C. Atrial Natriuretic Peptide
• D. Renin
Answer: B
Explanation: Antidiuretic hormone (ADH), also known as vasopressin, acts on the distal
tubules and collecting ducts of the kidneys to increase water reabsorption.
2. In the Renin-Angiotensin-Aldosterone System (RAAS), what is the primary
role of Angiotensin II?
• A. To stimulate the release of erythropoietin
• B. To cause systemic vasoconstriction and stimulate aldosterone release
• C. To inhibit the conversion of Angiotensin I
• D. To decrease peripheral vascular resistance
Answer: B
,Explanation: Angiotensin II is a potent vasoconstrictor and also stimulates the adrenal
cortex to release aldosterone, which increases sodium and water retention.
3. A patient with chronic kidney disease (CKD) often develops anemia. What is
the primary pathophysiological mechanism for this?
• A. Loss of iron through the urine
• B. Destruction of red blood cells by urea
• C. Vitamin B12 deficiency due to dietary restrictions
• D. Inadequate production of erythropoietin
Answer: D
Explanation: The kidneys produce erythropoietin in response to hypoxia; in CKD, the
damaged kidneys cannot produce sufficient amounts, leading to decreased red blood cell
production.
4. Which of the following is a characteristic feature of Type 1 Diabetes Mellitus?
• A. Insulin resistance in peripheral tissues
• B. Immune-mediated destruction of pancreatic beta cells
• C. Overproduction of insulin by beta cells
• D. Decreased glucose production by the liver
Answer: B
Explanation: Type 1 DM is characterized by an autoimmune destruction of the beta cells in
the pancreas, leading to an absolute insulin deficiency.
,5. What is the pathophysiological hallmark of Myasthenia Gravis?
• A. Degeneration of the myelin sheath in the CNS
• B. Destruction of acetylcholine receptors at the neuromuscular junction
• C. Loss of dopaminergic neurons in the substantia nigra
• D. Accumulation of amyloid plaques in the brain
Answer: B
Explanation: Myasthenia Gravis is an autoimmune disease where antibodies block or
destroy acetylcholine receptors at the neuromuscular junction, causing muscle weakness.
6. Which type of hypersensitivity reaction is involved in a systemic allergic
reaction to a bee sting (anaphylaxis)?
• A. Type III (Immune complex)
• B. Type II (Cytotoxic)
• C. Type I (IgE-mediated)
• D. Type IV (Delayed-type)
Answer: C
Explanation: Type I hypersensitivity involves IgE antibodies binding to mast cells, which
release histamine upon re-exposure to the allergen.
7. In Heart Failure, the release of Brain Natriuretic Peptide (BNP) is triggered by:
• A. Low cardiac output
• B. Sympathetic nervous system activation
, • C. Ventricular wall stretch due to increased volume
• D. Decreased renal perfusion
Answer: C
Explanation: BNP is secreted by the ventricles in response to increased pressure and
volume (stretch), acting as a natural diuretic and vasodilator to reduce workload.
8. Which of the following describes the pathophysiology of emphysema?
• A. Hypersecretion of mucus and chronic productive cough
• B. Reversible bronchospasm caused by environmental triggers
• C. Infection and inflammation of the pleural space
• D. Destruction of alveolar walls and loss of elastic recoil
Answer: D
Explanation: Emphysema is characterized by the permanent enlargement of gas-exchange
airways and destruction of alveolar walls, primarily due to an imbalance between
proteases and antiproteases.
9. What is the primary cause of ascites in patients with liver cirrhosis?
• A. Decreased production of bile salts
• B. Increased systemic blood pressure
• C. Decreased oncotic pressure due to hypoalbuminemia
• D. Excessive intake of sodium
Answer: C
