Lelaroselchecraywa Lelaroselchecraywa

26-11-2016
Biology

Answered

The two basic and opposite actions that account for all muscle movements are contraction and extension.

true or false

Verified Answer :

scme1702 scme1702

28-11-2016

False
Muscles are only able to contract or relax. This is why they need complementary muscles. For example, the bicep can raise the forearm, but cannot lower it. For that, the tricep is needed.

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