The posterior arm muscle that extends the forearm is the:
A) biceps brachii.
B) triceps brachii.
C) supinator.
D) brachialis.

Name: The posterior arm muscle that extends the forearm is the: A) biceps brachii. B) triceps brachii. C) supinator. D) brachialis.
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Question

Quizplus · Accepted Answer

The triceps brachii is the only muscle listed that extends the forearm. The biceps brachii flexes the forearm, the supinator supinates the forearm (turns it so that the palm faces up), and the brachialis flexes the elbow joint.

The Posterior Arm Muscle That Extends the Forearm Is The