What substance builds up in muscles leading to fatigue?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Biology Mcqsbiology-mcqs
Published
28 Feb 2021
Last updated
28 May 2026

Browse all Biology Mcqs

Choose the correct answer

Explanation

Muscle fatigue is primarily caused by the accumulation of lactic acid, which results from anaerobic respiration during intense exercise. The other acids listed do not contribute to muscle fatigue.

SolveExam — free MCQs and past papers for Pakistan government job tests. Content is for educational practice only.