Which term describes the joint action that increases the angle, such as when extending the knee?

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Multiple Choice

Which term describes the joint action that increases the angle, such as when extending the knee?

Explanation:
Extending the knee increases the angle between the thigh and lower leg, which is why extension is the correct term. When you straighten the leg, the gap between the two bones grows toward a straight-line position. In contrast, flexion bends the joint and reduces that angle. Adduction moves a limb toward the body's midline, and rotation turns a segment around its long axis; neither describes increasing the joint angle.

Extending the knee increases the angle between the thigh and lower leg, which is why extension is the correct term. When you straighten the leg, the gap between the two bones grows toward a straight-line position. In contrast, flexion bends the joint and reduces that angle. Adduction moves a limb toward the body's midline, and rotation turns a segment around its long axis; neither describes increasing the joint angle.

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