Q. The joint where the neck joins the head is:

Correct Answer: a) Pivotal joint

Explanation:

The joint where the neck joins the head is called a pivotal joint. This type of joint allows rotational movement, enabling the head to turn from side to side, as well as up and down. The pivotal joint is formed between the first two vertebrae of the spine: the atlas (C1) and the axis (C2).

– a) Pivotal joint: Correct, as it allows the head to rotate and move in different directions.

– b) Saddle joint: This type of joint allows movement in two directions, such as the thumb joint, but it is not found in the neck.

– c) Hinge joint: This joint allows movement in one direction, like the elbow or knee, but it does not apply to the neck.

– d) Ball and socket joint: This joint allows movement in all directions, such as the shoulder or hip, but it is not present in the neck.

Thus, the correct answer is a) Pivotal joint.