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satela [25.4K]
3 years ago
6

A mother sprints across the yard to grab her small child before he enters the street. The mother is using her __________. A. typ

e I A slow-twitch muscle fibers that provided her with a fast burst of movement B. type II B fast-twitch muscle fibers that respond quickly and provide her with speed and strength C. type I B intermediate-twitch muscle fibers that respond quickly because they are delivered energy aerobically D. type II A fast-twitch muscle fibers that act rapidly because they are delivered energy anaerobically
Health
2 answers:
Darya [45]3 years ago
8 0

Answer: B

Explanation: <u>Because I just answer it !</u>

lisabon 2012 [21]3 years ago
3 0

The answer is <u>"B. type II B fast-twitch muscle fibers that respond quickly and provide her with speed and strength".</u>


Fast-twitch muscles separate into two classes: moderate fast-twitch (type IIa) and fast-twitch (type IIb or IIx). Moderate fast-twitch muscles are thicker, faster to contract, and destroy more quickly than slow-twitch. Fast-twitch, the most ground-breaking and least in continuance, are initiated when the body nears greatest effort.  

Here's the means by which it works: During aerobic activities, for example, running or swimming, slow-twitch fibers are the first to contract. At the point when the slow-twitch fibers wind up drained, fast-twitch fibers start to assume control.  


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