Question

if you were to extend (straighten) your arm at the elbow, which muscle would then become the agonist? * 1 point
a) triceps
b) biceps
c) quadriceps
d) hamstrings

Explanation:

The triceps is the muscle responsible for extending the arm at the elbow. The biceps flexes the elbow, the quadriceps is for knee - extension in the leg, and the hamstrings are for knee - flexion in the leg.

Answer:

A. Triceps