Shape of slow-twitch fiber is___________________?
Correct answer: C. Red muscle
- A. White muscle fiber
- B. Only A
- C. Red muscle
- D. All above
Explanation
Slow-twitch, or Type I, fibers contain abundant myoglobin and mitochondria, giving them a red appearance and making them suited to endurance activity. White fibers are associated mainly with fast-twitch fibers.
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