Question

Consider the following statements with two blanks X and Y and select the option which correctly fills up these blanks? In the centre of the inter vertebrel disc, a soft area is present called ______ X __________. Which is supposed to be remnant of ________ Y _________.

X	Y
(a) Nucleus pulposus	Notocord
(b) Nerve cord	Notocord
(c) Pulposus	Notocord
(d) Notocord	Nerve cord

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is A A

Nucleus pulposus is the soft area present in the centre of the intervertebral disc and is the remnant of the notochord. In most vertebrates, notochord becomes nucleus pulposus of the intervertebral disc. The notochord is a flexible rod-like structure found in embryonic stages and in some adult chordates. It plays a key role in signalling and coordinating development. Nucleus pulposus soft and elastic structure allows the vertebral disc to withstand forces of torsion and compression. The correct answer is option A.