When a person straightens their arm out they are flexing the triceps brachii.During this movement the triceps is referred to as the _________.

Question

Quizplus · Accepted Answer

When a person straightens their arm out, the triceps brachii muscle is contracting and causing movement at the elbow joint. The muscle responsible for causing the movement is known as the agonist. Therefore, the triceps brachii is the agonist during this movement. The antagonist would be the biceps brachii, which would be relaxing and allowing the triceps to carry out the movement. The tendon is a fibrous band of tissue that attaches muscle to bone, and is not relevant to this scenario.

When a Person Straightens Their Arm Out They Are Flexing