Choose the description that best explains the role of the triceps and biceps during extension.

A. The triceps is the antagonist and the biceps is the extensor, or prime mover.
B. The triceps is the extensor, or prime mover, and the biceps is the antagonist.
C. The triceps is the extensor, or prime mover, and the biceps is the flexor.
D. The triceps and biceps are both antagonists.



Answer :

Final answer:

The triceps extends the arm while the biceps flexes it, working as an antagonistic pair.


Explanation:

The triceps muscle is the extensor responsible for extending the arm at the elbow by contracting, while the biceps muscle is the flexor that bends the arm. Together, they form an antagonistic pair of muscles that work in opposition to each other.


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