PSI Barbering Practice Exam

The tricep is a large muscle that covers the entire back of the upper arm and extends the forearm. What is its primary function?

1. Flexion of the elbow

2. Extension of the elbow

3. Rotation of the shoulder

4. Adduction of the arm

The correct answer is: Extension of the elbow

The tricep's primary function is to facilitate the extension of the elbow. This muscle, located at the back of the upper arm, plays a crucial role in straightening the arm by allowing the forearm to move away from the upper arm. When the tricep contracts, it pulls on the elbow joint, enabling the extension movement. This action is vital for various everyday tasks that require pushing or throwing motions, as well as for exercises such as push-ups and bench presses. Understanding the muscle's role in extending the elbow helps to appreciate its importance in maintaining functional movement and strength in the arms. In contrast, other functions related to the options, such as flexion of the elbow or shoulder rotation, do not accurately represent the primary action of the tricep muscle. The tricep does not participate in shoulder adduction either, which further clarifies its specific function in the context of upper arm mechanics.