Biology Support & Movement UHS 2024
PMDC Verified Question 14 of 75
The accumulation of 'lactic acid' in the muscles results in:
A
Extreme fatigue
B
Muscle contraction
C
Paralysis
D
Convulsion
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Extreme fatigue
Concept:

Metabolic consequences of anaerobic respiration.

Formula:

N/A (Conceptual)

Solution:

  • When strenuous exercise outpaces oxygen delivery, muscle cells resort to anaerobic glycolysis to generate emergency ATP.


  • This process rapidly produces a highly acidic byproduct: lactic acid.


  • The buildup of lactic acid violently drops the intracellular pH, directly interfering with enzyme activity and calcium binding, forcing the muscle to lose its ability to contract efficiently. This state is known as Extreme fatigue.


Why other options are incorrect:

Lactic acid inherently hinders further muscle contraction; it does not cause it. It causes severe burning and exhaustion, but not total neurological paralysis or systemic convulsions.

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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