Biology Circulation / Transport ETEA 2023
PMDC Verified Question 21 of 54
The Purkinje fibers are the specialized fibers found in:
A
Human heart
B
Human lungs
C
Human Stomach
D
Human brain
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Human heart
Concept:

The rapid, synchronized contraction of the massive ventricular muscle requires a specialized, high-speed electrical conduction system.

Formula:

None

Solution:

  • The electrical signal travels from the AV node, down the Bundle of His, and splits into the bundle branches.


  • At the apex of the heart, these branches curve upward and disperse into a network of highly specialized conducting cells called Purkinje fibers.


  • These fibers distribute the electrical impulse uniformly throughout the ventricular walls of the human heart.


Why other options are incorrect:

  • Lungs, stomach, and brain rely on the autonomic nervous system, not the intrinsic Purkinje conduction network.

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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