Biology Chemical Coordination SZABMU 2024
PMDC Verified Question 6 of 50
Which of the following hormone has the greater influence on peripheral vasoconstriction?
A
Nor-epinephrine
B
Parathormone
C
Epinephrine
D
Corticosteroids
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Nor-epinephrine
Concept:

Blood pressure regulation during shock or stress relies on the constriction of peripheral blood vessels to shunt blood to vital organs.

Solution:

  • While adrenaline (epinephrine) dilates vessels in skeletal muscle, Norepinephrine (noradrenaline) has an incredibly high affinity for alpha-1 adrenergic receptors located on the smooth muscle of peripheral blood vessels.


  • This causes profound and widespread peripheral vasoconstriction, dramatically spiking blood pressure.


Why other options are incorrect:

Epinephrine has mixed dilatory and constrictive effects. Parathormone regulates calcium. Corticosteroids manage long-term stress and metabolism.

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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