Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 51 of 99
Which hormone directly controls urine formation by altering the water permeability of renal distal convoluted tubules and collecting ducts?
A
ACTH
B
ADH (Vasopressin)
C
Oxytocin
D
Somatotropin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: ADH (Vasopressin)
Concept: Endocrine regulation of diuresis.

Solution: ADH (antidiuretic hormone) acts on the distal convoluted tubule and collecting ducts to increase water reabsorption, concentrating urine and reducing total urine volume.

Why other options are incorrect:
  • Option A (ACTH): Stimulates the adrenal cortex to secrete cortisol.

  • Option C (Oxytocin): Stimulates uterine contractions and milk ejection.

  • Option D (Somatotropin): Growth hormone promoting protein synthesis and tissue growth.

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.

Previous Question All Homeostasis MCQs Next Question

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.

Enter Arena Sprint iOS App Android App