Which term describes the increase in the angle of a joint?

• A. Flexion
• B. Extension
• C. Hyperextension
• D. Adduction

Answer: (B)

The term that describes the increase in the angle of a joint is extension. This movement occurs when two body parts are straightened, leading to a greater angle between the articulating bones at the joint. For example, when you straighten your arm from a bent position, you are performing an extension of the elbow joint. This action is crucial for many daily activities and is a fundamental movement in anatomical terms.

Flexion, on the other hand, refers to the decrease in the angle of a joint, such as bending the elbow or knee. Hyperextension occurs when a joint is extended beyond its normal range of motion, while adduction refers to the movement of a limb toward the body's midline. Understanding these terms and their definitions is essential in the study of human anatomy and movement mechanics.