Question

The knee is _____.

• A. Ball and socket joint
• B. Hinge joint
• C. Angular joint
• D. Pivotal joint

Answer 1

The correct option is B

Hinge joint

The correct option is (B):

Explanation of correct option:

1. Joints are the connections between the two bones that help in locomotion in the human body.
2. Joints are classified into 5 types based on their function: fixed or immovable joints, ball and socket joints, hinge joints, pivotal joints, and angular joints.
3. Hinge joints are that allow bones to move back and forth.
4. The end of bones fit into each other in such a way that movement is possible in only one direction in the hinge joint.
5. For example; knees, elbow, and ankle joints.

Explanation of incorrect answer:

Option (A)

1. In these types of joints, the ball of one bone fits into the socket of another.
2. Such kinds of joints make movement possible in all directions.
3. For example; these types of joints are found in the hips and shoulders.

Option (C)

1. These joints allow angular movement only, so that movement is possible in two directions.
2. This joint is present in the wrist and ankle.

Option (D)

1. When bone moves in the ring or around the bone so rotating movement is possible is called a pivotal joint.
2. For example; the skull rotates on the vertebral column.

Final answer:

The knee is hinge joint.