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Kobotan [32]
3 years ago
5

To raise an arm upward, the muscle on one side of its contracts. What happens to the muscle on the opposite side of the arm? A.c

ontracts B.relaxes C.both contracts and relaxes D.neither contracts nor relaxes
Biology
1 answer:
Alika [10]3 years ago
7 0

Answer:

B. it relaxes

Explanation:

Antagonisms. one muscle contract while the opposite one relaxes to carry out an action.

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