Question

Which is a muscle on the posterior portion of the upper arm?

O triceps brachii
O trapezius
O gastrocnemius
O deltoid

Answer 1

The muscle on the posterior portion of the upper arm is the triceps brachii. It is a large muscle that runs along the back of the upper arm, from the shoulder to the elbow, and is responsible for extending the elbow joint. The triceps brachii is composed of three heads: the long head, lateral head, and medial head. It is an important muscle for many activities, including pushing, pulling, and lifting.