Question

bio-201 topic 4: skeletal and smooth muscle
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what is the difference between slow - twitch and fast - twitch muscle fibers?
fast - twitch fibers are highly resistant to fatigue, while slow - twitch fibers fatigue quickly.
slow - twitch fibers are highly resistant to fatigue, while fast - twitch fibers fatigue quickly.
slow - twitch fibers are less resistant to fatigue than fast - twitch fibers.
fast - twitch fibers are used for explosive movements, while slow - twitch fibers are used for sustained activity.
slow - twitch fibers are used for short bursts of power, while fast - twitch fibers are used for endurance exercise.

Explanation:

Slow - twitch muscle fibers are aerobic and better for endurance, being highly resistant to fatigue. Fast - twitch fibers are anaerobic, used for quick, explosive movements and fatigue quickly.

Answer:

B. Slow - twitch fibers are highly resistant to fatigue, while fast - twitch fibers fatigue quickly.
D. Fast - twitch fibers are used for explosive movements, while slow - twitch fibers are used for sustained activity.