MCQ Collection
Pakistan MCQs
Practice Pakistan questions with answers and explanations.
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Correct Answer: A. Atrioventricular valves
Explanation:
Rising ventricular pressure closes the atrioventricular valves.
This produces the first heart sound and prevents backflow to atria.
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Correct Answer: A. Destruction of alveolar walls and loss of surface area
Explanation:
Alveolar walls break down and elastic recoil decreases.
The effective respiratory surface becomes smaller.
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Correct Answer: B. Atrioventricular valves
Explanation:
Rising ventricular pressure closes the atrioventricular valves.
This produces the first heart sound and prevents backflow to atria.
Choose an option to check your answer.
Correct Answer: B. Destruction of alveolar walls and loss of surface area
Explanation:
Alveolar walls break down and elastic recoil decreases.
The effective respiratory surface becomes smaller.
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Correct Answer: C. Atrioventricular valves
Explanation:
Rising ventricular pressure closes the atrioventricular valves.
This produces the first heart sound and prevents backflow to atria.
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Correct Answer: C. Glomerular capillaries
Explanation:
Glomerular pressure drives fluid into Bowman’s capsule.
Peritubular capillaries mainly support reabsorption and secretion.
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Correct Answer: D. A phase in which heart chambers relax and fill
Explanation:
During diastole, chamber pressure falls and filling occurs.
The cardiac cycle alternates systole and diastole.
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Correct Answer: D. Glomerular capillaries
Explanation:
Glomerular pressure drives fluid into Bowman’s capsule.
Peritubular capillaries mainly support reabsorption and secretion.
Choose an option to check your answer.
Correct Answer: A. A phase in which heart chambers relax and fill
Explanation:
During diastole, chamber pressure falls and filling occurs.
The cardiac cycle alternates systole and diastole.
Choose an option to check your answer.
Correct Answer: A. Glomerular capillaries
Explanation:
Glomerular pressure drives fluid into Bowman’s capsule.
Peritubular capillaries mainly support reabsorption and secretion.
Choose an option to check your answer.
Correct Answer: B. A phase in which heart chambers relax and fill
Explanation:
During diastole, chamber pressure falls and filling occurs.
The cardiac cycle alternates systole and diastole.
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Correct Answer: B. Receive reabsorbed substances and participate in secretion
Explanation:
Peritubular capillaries surround renal tubules.
They exchange water and solutes with tubular cells.
