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Which is a characteristic of fast-­twitch muscle fibers?

A. They contain more myoglobin than slow­t-witch fibers.
B. They are resistant to fatigue.
C. They have fewer mitochondria than slow-­twitch fibers.
D. They require high amounts of oxygen in order to function

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Answer:

The answer is C.

Explanation:

Due to fewer capillaries, mitochondria, myoglobin, and lower oxygen transport, type II- fast twitch muscle fibers are "fast" or quick to fatigue. With their short-term contractions, they also create greater force and strength.

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