Question

Ball and socket joint is found in:
A. Skull
B. Shoulder
C. Knee
D. Atlas and axis

Answer 1

Hint: The Ball and socket joint features one bone with a rounded head sitting inside the cup(socket) of another bone. The ball and socket joint therefore permit movement in all directions! Just think of such a joint which we can freely move all around.

Complete Answer:
A. Skull joints are immovable. The joints of the skull are largely fibrous joints.
B. Shoulder joint – ball and socket movable joint with a large humeral head in
a shallow glenoid cavity is present in the shoulder. Because of the joint we can move the shoulder as it provides swing for the arms.
C. Knee joint- Movable hinge type joint i.e. leg moves bend back and forth. Hinge joint doesn’t sideways/rotational movement, unlike ball and socket joint
D. Atlas and axis - It is a pivot joint. It is the joint between the first and second cervical vertebrae. in simple terms joint in the neck is called Atlas and axis joint

Hence the correct answer is option ‘B’.

Note: Another example of a ball and socket joint is the Hip Joint with femur sitting in the acetabulum.