Question

A ball and socket joint is different from other joints because only a ball and socket joint

• A. Allows movement in one direction
• B. Does not allow movement
• C. Allows movement in all directions
• D. Allows only a little movement

Answer 1

The correct option is C

Allows movement in all directions

Correct option is (C):
Explanation for correct option:

1. Ball and socket joints are the most flexible joints present in the body, it tends to allow the movement of the bones in every possible direction.
2. The knob-like ball end of one bone locks into the cup-like cavity in another bone.
3. Example: The joints in the shoulder and hip bones.

Explanation for incorrect options:
Option (A):

1. Freely movable joints are joints with comparatively more movement, which allows the movement in just one direction either up and down (hinge joints) or sideways (pivot joints) or in every direction like that in ball and socket joint.
2. Examples: The joints present between fingers, knee, the first vertebral column, skull, etc.

Option (B):

1. Immovable or fixed joints do not allow any kind of movement between the bones.
2. Examples: The bones of the skull are connected by means of immovable joints.

Option (D):

1. Slightly movable joints allow a little movement at the junction of the joints.
2. Example: The joints are present between the vertebrae and rib cage.

Final answer: A ball and socket joint is different from other joints because only a ball and socket joint allows movement in all directions.