The long head of the biceps brachii is responsible for abduction of the arm at the glenohumeral joint. The short head does not have any significant action in the shoulder joint. Option B and D are incorrect because both the heads of the biceps brachii act on the elbow joint, not the shoulder joint. Option C is incorrect because the short head does not have any significant action in the shoulder joint.

Solved

Which Is True

Question 24

Multiple Choice

Which is true?

A) the long head of the biceps brachii does abduction of the arm at the glenohumeral joint
B) the short head of the biceps brachii does pronation of the forearm at the elbow joint
C) the short head of the biceps brachii does abduction of the arm at the glenohumeral joint
D) the long head of the biceps brachii does adduction of the arm at the glenohumeral joint

Correct Answer: