Question

Assertion : Myelinated nerve fibre are enveloped with Schwan cells, which form a myelin sheath around the axon
Reason : Unmyelinated nerve fibre is not enclosed by a Schwan cell and hence does not form a myelin sheath around the axon.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer 1

Correct Answer - C
The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.
Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon, and is commonly found in autonomous and the somatic neural systems.