Which of the following characteristics BEST describes type I muscle fibers?

Question

Quizplus · Accepted Answer

Type I muscle fibers are also known as slow-twitch fibers and they have a slow contraction speed. They also have high myoglobin content, which allows them to use oxygen efficiently and rely on the aerobic energy system. These fibers are more resistant to fatigue compared to type II muscle fibers, which rely on anaerobic energy production. Therefore, option D (slow contraction speed, high myoglobin content, aerobic energy system) best describes type I muscle fibers.

Which of the Following Characteristics BEST Describes Type I Muscle