Biology Chemical Coordination MDCAT 2015
PMDC Verified Question 48 of 50
\(\alpha\)-cells of pancreas secrete a hormone known as:
A
Glucagon
B
Gastrin
C
Insulin
D
Rennin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Glucagon
Concept:

The endocrine portion of the pancreas contains distinct cell types that secrete opposing metabolic hormones.

Solution:

  • Alpha (\(\alpha\)) cells continuously monitor blood glucose and secrete glucagon when blood sugar drops too low.


  • Glucagon travels to the liver and stimulates glycogenolysis, dumping stored glucose back into the blood.


Why other options are incorrect:

Beta cells secrete insulin. Gastrin is secreted by the stomach lining, and rennin is an enzyme in the stomachs of infants to curdle milk.

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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