Biology Circulation / Transport SZABMU 2023
PMDC Verified Question 17 of 54
Choose the correct pathway for the flow of blood:
A
Arterioles --- metarterioles thoroughfare channel capillaries
B
Capillaries through fare channel metarterioles arterioles
C
Throughfare channel metarterioles capillaries arterioles
D
Metarterioles arterioles throughfare channels capillaries
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Arterioles --- metarterioles thoroughfare channel capillaries
Concept:

Blood flows sequentially from high pressure macroscopic vessels to low pressure microscopic vessels.

Formula:

None

Solution:

  • Blood exits the arteries into smaller arterioles.


  • Arterioles branch into terminal extensions called metarterioles.


  • Metarterioles act as a vascular shunt, passing directly through the capillary bed as a thoroughfare channel, which then supplies the true capillaries branching off it.


Why other options are incorrect:

  • Options B, C, and D present the sequence backward or scrambled, violating the pressure gradient from arteries to capillaries.

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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