Question

Consider the following statements and find out coorect option:
(a) Three are two types of axons, namely myelinated and non myelinated
(b) Myelinated nerve fibres found in autonomous and the somatic neural systems
(c) The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.
(d) The gap between two adjacent myelin sheaths are calleds nodes of Ranvier.
(e) Unmyelinated nerve fibre found in spinal and cranial nerves
(f) Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon.

• A. $a,b,c,d,e,$
• B. $a,b,c,d,f$
• C. $a,c,d,f$
• D. $a,c,d$

Answer 1

The correct option is C $a,c,d,f$

Myelinated nerve fibres are found in the brain, spinal cord, cranial and spinal nerves. While non-myelinated nerve fibres are found in autonomous and somatic neurons. Hence statements (b) and (e) are incorrect.

So, correct option is '$a,c,d,f$'.