The muscle that extends the arm while doing push-ups is the
A) deltoid.
B) pectoralis major.
C) brachialis.
D) triceps brachii.
E) biceps brachii.

Question

Quizplus · Accepted Answer

The triceps brachii is the muscle responsible for extending the arm during push-ups. This is because it is the primary extensor muscle of the elbow joint. The deltoid and pectoralis major muscles are involved in shoulder joint movement, while the brachialis and biceps brachii are involved in elbow flexion. Therefore, D is the correct answer.

The Muscle That Extends the Arm While Doing Push-Ups Is