Biology Chemical Coordination AJK 2019
PMDC Verified Question 42 of 50
When secretion of ADH is increased, the amount of water reabsorbed is:
A
Increased
B
Maintained
C
Decreased
D
Has no effect on reabsorption
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Increased
Concept:

Antidiuretic Hormone (ADH) maintains blood osmolarity by preventing excessive water loss in the urine.

Solution:

  • ADH binds to receptors on the collecting ducts of the nephrons in the kidney.


  • This triggers the insertion of aquaporin water channels into the cell membrane, which drastically increases the reabsorption of free water back into the bloodstream, producing highly concentrated urine.


Why other options are incorrect:

Decreased water reabsorption occurs when ADH levels drop, leading to dilute urine (as seen in diabetes insipidus).

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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