Biology Chemical Coordination NUMS 2023
PMDC Verified Question 18 of 50
Hormone secreted in bulk due to decreased water content of blood is:
A
ADH
B
Oxytocin
C
Glucagon
D
Thyroxin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: ADH
Concept:

The body must continuously balance water intake and output. Dehydration shrinks blood volume and concentrates solutes.

Solution:

  • When blood water content drops, osmolarity rises. Hypothalamic osmoreceptors detect this thick, salty blood.


  • They trigger the posterior pituitary to secrete bulk quantities of Antidiuretic Hormone (ADH). ADH forces the kidneys to reabsorb water, pulling it back into the blood to prevent fatal dehydration.


Why other options are incorrect:

Glucagon and thyroxin deal with metabolic energy, not osmoregulation. Oxytocin is for reproduction.

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.

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.