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The term "flexion" refers to which movement?

  1. Bending a body part

  2. Excessive straightening of a body part

  3. Turning the joint outward

  4. Touching an opposite finger with the thumb

The correct answer is: Bending a body part

Flexion refers to the movement of bending a body part. This motion decreases the angle between two body parts at a joint. For example, when you bend your elbow to bring your hand closer to your shoulder, you are demonstrating flexion at the elbow joint. The other options are incorrect because: - Option B, excessive straightening of a body part, refers to hyperextension. - Option C, turning the joint outward, describes external rotation. - Option D, touching an opposite finger with the thumb, is an example of opposition, not flexion.