Biology Support & Movement ETEA 2023 Retake
PMDC Verified Question 40 of 75
Muscle fatigue results due to deficiency of ____ and excess accumulation of ____.
A
Adenosine triphosphate, lactic acid
B
Adenosine triphosphate, ionic imbalance
C
Glucose, lactic acid
D
Glucose, ionic imbalance
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Adenosine triphosphate, lactic acid
Concept:

Metabolic basis of muscle fatigue.

Formula:

N/A (Conceptual)

Solution:

  • During extreme exertion, oxygen delivery falls behind demand, forcing the muscle to rely entirely on anaerobic glycolysis.


  • This highly inefficient pathway inevitably results in a severe deficit of the energetic currency, Adenosine triphosphate (ATP).


  • Simultaneously, the anaerobic breakdown of glucose forces the production and rapid, painful accumulation of the toxic byproduct lactic acid, which drops tissue pH and inhibits enzyme function.


Why other options are incorrect:

While glucose depletion contributes to general exhaustion, the direct physiological cause of acute mechanical fatigue is the lack of ATP coupled with lactic acid poisoning.

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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