Question

question 20 (multiple choice worth 4 points) (02 05r mc) which type of muscle fiber would spend more time active in the excitation step of the sliding filament theory? mixed fibers fast twitch fibers voluntary muscle fibers slow twitch fibers

Explanation:

Slow - twitch fibers contract more slowly and have a higher endurance. They are more active for longer - duration activities, which means they would spend more time in the excitation step of the sliding filament theory compared to fast - twitch fibers that are for quick, powerful contractions. Voluntary muscle fibers is a general term and not specific to the time in excitation. Mixed fibers are a combination and not the best answer compared to slow - twitch fibers.

Answer:

D. Slow twitch fibers