Question

The metacarpophalangeal joints (knuckle joints) are an example of a ____ joint

Answer 1

The metacarpophalangeal joints (knuckle joints) are examples of condyloid joints which allow bending and straightening of the fingers and side-to-side movements of the hand.

Step-by-step explanation:

The metacarpophalangeal joints, also known as knuckle joints, are examples of condyloid joints. Condyloid joints are biaxial joints that allow movements in two planes. In the case of metacarpophalangeal joints, one movement involves bending and straightening the fingers, while the second movement is a side-to-side movement, allowing the spreading apart and bringing together of the fingers or moving the hand in a medial or lateral direction.