MDCAT Physics MCQ #627

MDCAT Physics MCQ #627

1. Question 1

   Q1. A person experiences muscle fatigue during a prolonged activity. What is the role of muscle fibers in this scenario?

   • A) Fast-twitch muscle fibers are responsible for the initial rapid ATP production during the activity.
   • B) Slow-twitch muscle fibers are responsible for the initial rapid ATP production during the activity.
   • C) Fast-twitch muscle fibers are responsible for the sustained ATP production during the activity.
   • D) Slow-twitch muscle fibers are responsible for the sustained ATP production during the activity.

   Answer: Slow-twitch muscle fibers are responsible for the initial rapid ATP production during the activity.

   Explanation: Slow-twitch muscle fibers are more efficient in sustained activities and utilize oxidative phosphorylation for ATP production.