Question

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?
A. contracts
B. relaxes
C. both contracts and relaxes
D. neither contracts nor relaxes

Answer 1

To raise an arm upward, the muscle on one side of its contracts, the muscle on the opposite side of the arm relaxes.

What is a muscle?

Generally, a muscle is simply defined as fibrous tissue in a human or animal body that has the capacity to contract, causing movement or holding portions of the body in place.

In conclusion, The muscle of humans gets to relax and contract.

Read more about Humans

https://brainly.com/question/18540902

#SPJ5

Answer 2

Answer:

a

Explanation: