MDCAT Physics MCQ #914

A 16-year-old athlete experiences muscle fatigue during a prolonged exercise. Which process is primarily responsible for the muscle's reduced ability to contract?

MDCAT Physics MCQ #914

  1. Question 1

    Q1. A 16-year-old athlete experiences muscle fatigue during a prolonged exercise. Which process is primarily responsible for the muscle's reduced ability to contract?

    • A) The muscle relies on anaerobic respiration to produce ATP, which is inefficient and leads to fatigue.
    • B) The muscle's ability to relax and replenish ATP stores is impaired.
    • C) The muscle's actin and myosin filaments are damaged during the prolonged exercise.
    • D) The muscle's neuromuscular junction is impaired, disrupting the transmission of nerve impulses.

    Answer: The muscle's ability to relax and replenish ATP stores is impaired.

    Explanation: The muscle's ability to relax and replenish ATP stores is impaired during prolonged exercise, leading to reduced muscle contraction.