asked 149k views
0 votes
When a muscle contracts, what two

things are changing within the cells to
cause the movement of the muscle?
A. color and size
B. shape and length
C. energy and fatigue

2 Answers

4 votes
B shape and length. The actin and myosin filaments in the muscle are changing their shape and length when they contract or relax. This is what makes certain chemicals to be released for the action of movement.
answered
User Serge Nikitin
by
7.0k points
3 votes
The answer is B: shape & size
answered
User Paul Hodgson
by
8.6k points

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