Question

speed depends upon (a) slow twitch fibers) fast twitch fiber (c) bone (d) muscles
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Answer 1

Answer:

fast twitch muscle fibre

Explanation:

slow-twitch muscle fibers, which move more slowly but help to keep you moving longer. fast-twitch muscle fibers, which help you move faster, but for shorter periods.

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Answer 2

Explanation:

slow twitch fibers . a is the anwer