Question

Correct the given statements by replacing the underlined words and select the correct option.

(i) The hinge joint is present in our neck.
(ii) The number of bones in our appendicular skeleton is 140.
(iii) The number of bones present in the vertebral column in human 36.
(iv) The complete bowling action in cricket is possible because our arm is joined to our shoulder by a pivot joint.

• A. (i) Ball and socket joint, (ii) 140, (iii) 33, (iv) Hinge joint.
• B. (i) Fixed joint, (ii) 126, (iii) 33, (iv) saddle joint.
• C. (i) Pivot joint, (ii) 126, (iii) 26, (iv) Ball and socket joint.
• D. (i) Pivot joint, (ii) 130, (iii) 26, (iv) Ball and socket joint.

Answer 1

The correct option is C (i) Pivot joint, (ii) 126, (iii) 26, (iv) Ball and socket joint.

i) In our neck cervical vertebrae form joints which are pivotal joints.

ii) Each appendage has 30 bones so the appendicular skeleton has less the 140 bones.

iii) Number of bones in the vertebral column are 26 and not 36.

iv) Arm is joined to the shoulder not by a pivot but a ball and socket joint.

So, the correct option is (i) Pivot joint, (ii) 126, (iii) 26, (iv) Ball and socket joint.