On spring break you travel to Malibu,California.While there,you visit the famous Malibu beach to observe the parade of body builders.They each show off their massive muscles with the standard "pump you up" arm flexion.Which muscle would be least involved with this action?
A)Brachialis
B)Supraspinatus
C)Biceps brachii
D)Brachioradialis
E)Pronator teres

Question

Quizplus · Accepted Answer

The supraspinatus muscle is located on the upper back and is responsible for the abduction of the arm (raising it out to the side). It is not directly involved in the arm flexion seen in the "pump you up" pose performed by body builders. The other muscles listed (A) Brachialis, (C) Biceps brachii, (D) Brachioradialis, and (E) Pronator teres are all located in the arm and contribute to arm flexion in different ways.

On Spring Break You Travel to Malibu,California