Compared to Type I (Slow Oxidative) Skeletal Muscle Fibers, How

question 3

Multiple Choice

Compared to type I (slow oxidative) skeletal muscle fibers, how are type IIb (fast-glycolytic) skeletal muscle fibers different?

• A) Type IIb fibers have more abundant mitochondria.
• B) Type IIb fibers fatigue more readily.
• C) Type IIb fibers have more abundant myoglobin.
• D) Type IIb fibers are smaller in diameter.
• E) Type IIb motor units contain fewer fibers per alpha motor neuron.

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