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5 votes
To raise an arm upward, the muscle on one side of it contracts.

What happens to the muscle on the opposite side of the arm?
o
O
o
o
contracts
relases
both contracts and relates
neither contracts nor relates

User NickLamp
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2 Answers

2 votes
Releases is the answer when one side contracts the other releases
User Shafique
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1 vote
letter c ! both contracts and relates ! hope this helps!
User Herald Smit
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