Why are slow-twitch muscles more resistant to fatigue during exercise, thus making them better for longer duration exercises?

Why are slow-twitch muscles more resistant

Multiple choice — select the best answer

AThey have more developed sarcoplasmic reticula, which release calcium more slowly.
BThey have less developed sarcoplasmic reticula, which release calcium more quickly.
CThey have more developed sarcoplasmic reticula, which release calcium more quickly.
DThey have less developed sarcoplasmic reticula, which release calcium more slowly.

✓ Correct answer: D. They have less developed sarcoplasmic reticula, which release calcium more slowly. Slow-twitch muscles are more resistant to fatigue during exercise because they have less developed sarcoplasmic reticula, which release calcium more slowly. This causes a slower rate of ATP hydrolysis, so they do not tire as quickly.

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Why are slow-twitch muscles more resistant to fatigue during exercise, thus making them better for longer duration exercises?

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