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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
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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

User Minal Shah
by
3.4k points

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.
User Serge Nikitin
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3.1k points
3 votes
The answer is B: shape & size
User Paul Hodgson
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3.7k points
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