Biology Homeostasis PMDC Conceptual Practice
PMDC Verified Question 90 of 99
In response to binding the peptide hormone glucagon, target liver cells produce which intracellular second messenger to stimulate glycogenolysis?
A
Cyclic AMP (cAMP)
B
Insulin
C
Inositol trisphosphate (IP3)
D
Calmodulin
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Cyclic AMP (cAMP)
Concept: Glucagon signaling cascade.

Solution: Glucagon binds to G-protein coupled receptors on hepatocytes, activating adenylyl cyclase to produce cyclic AMP (cAMP), which activates protein kinase A to trigger glycogen breakdown.

Why other options are incorrect:
  • Option B (Insulin): A pancreatic hormone that opposes glucagon action.

  • Option C & Option D: Secondary messengers involved in calcium signaling pathways.

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.