MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Peripheral Nervous System

When unmyelin...

Question

When unmyelinated axons has Schwann cells why they don't form myelin sheath? Second why microglial cells are mesodermal in origin and rest nervous system is ectodermal in origin?

Open in App

Solution

Suggest Corrections

thumbs-up

13

Similar questions

Q. 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 myelinated nerve fibre is enveloped by Schwann cells, which form a myelin sheath around the axon.

An unmyelinated nerve fibre is not enclosed by a Schwann cell and hence does not form a myelin sheath around the axon.

Q. Is myelin sheath present around the Schwann cell or Schwann cells are present around myelin sheath?

Q. Read the given statements and select the correct option.
(i) Synaptic cleft of neurons secretes adrenaline.
(ii) Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon.
(iii) Non-myelinated nerve fibre is enclosed by a Schwann cells that does not form a myelin sheath.
(iii) Spinal and cranial nerves are made of non-myelinated nerve fibres

Q. Unmyelinated axons differ from myelinated in that they

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Nervous Tissue

BIOLOGY

Watch in App

explore_more_icon

Explore more

Peripheral Nervous System

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon