What is the action of the muscle labeled I?
A)extends the forearm at the elbow joint
B)flexes the forearm at the elbow joint
C)pronates the forearm at the radioulnar joints
D)abduct arm at shoulder joint
E)rotates arm at shoulder joint

Question

What is the action of the muscle labeled I? 
A)extends the forearm at the elbow joint 
B)flexes the forearm at the elbow joint 
C)pronates the forearm at the radioulnar joints 
D)abduct arm at shoulder joint 
E)rotates arm at shoulder joint

Quizplus · Accepted Answer

The muscle labeled I is the biceps brachii, which is responsible for flexing the forearm at the elbow joint.

What Is the Action of the Muscle Labeled I