Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 57 of 99
In the human nephron, the counter-current multiplier system operates specifically within the:
A
Bowman's capsule
B
Glomerulus
C
Loop of Henle
D
Collecting duct
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Loop of Henle
Concept: Countercurrent multiplication mechanism.

Solution: Countercurrent multiplication occurs in the Loop of Henle, where opposing fluid flow in descending and ascending limbs coupled with active salt pumping in the thick ascending limb creates a medullary concentration gradient.

Why other options are incorrect:
  • Option A & Option B: Perform ultrafiltration of plasma.

  • Option D: Collecting ducts serve as osmotic exchangers that utilize the medullary gradient generated by the Loop of Henle.

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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