MDCAT Physics MCQ #918

MDCAT Physics MCQ #918

1. Question 1

   Q1. A person experiences muscle fatigue during a prolonged exercise. Which process is primarily responsible for the muscle's reduced ability to relax?

   • 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 relaxation.