Biology Circulation / Transport SZABMU 2024
PMDC Verified Question 5 of 54
Which of the following vessels have larger bore, thin wall with non-pulsatile nature?
A
Aorta
B
Arteries
C
Capillaries
D
Veins
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: Veins
Concept:

Vessel histology and anatomy directly reflect the blood pressure they must endure.

Formula:

None

Solution:

  • By the time blood passes through the capillary beds and enters the venous return system, almost all cardiac pressure has dissipated.


  • To accommodate large volumes of sluggish blood, veins possess a larger lumen (bore) than corresponding arteries.


  • Because they face very low pressure, their muscular walls (tunica media) are much thinner, and the flow of blood through them is smooth and continuous (non-pulsatile), unlike the throbbing of arteries.


Why other options are incorrect:

  • Arteries/Aorta: Have thick, elastic walls and experience highly pulsatile pressure.


  • Capillaries: Microscopic bore, one cell thick.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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