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Neuron

Which part of...

Question

Which part of neuron acts as an insulator?

A

Dendrite

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B

Myelin sheath

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C

Axon

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D

Cell body

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Solution

The correct option is B
Myelin sheath

Myelin sheath which covers the axon is composed of fatty material (like cholesterol, few proteins and some lipids). Myelin with its various components prevents mixing of impulses in the adjacent nerve fibres.

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Similar questions

Q. Match the following parts of a neuron to their respective functions.

Parts of Neuron	Functions
(A) Dendrite	(i) Insulates axon
(B) Axon	(ii) Recieves impulses
(C) Myelin sheath	(iii) Conducts impulses

Q. What is the function of myelinated sheath in a neuron?

Q. (a) Draw the structure of a neuron and label the following on it:
Nucleus, Dendrite, Cell body and Axon
(b) Name the part of neuron:
(i) where information is acquired.
(ii) through which information travels as an electrical impulse.

Q. Electrical impulse travels in a neuron from :
(a) dendrite → axon → axon end → cell body
(b) cell body → dendrite → axon → axon end
(c) dendrite → cell body → axon → axon end
(d) axon end → axon → cell body → dendrite

Q. In which part of the neuron are the Nissl’s granules present?
I. Cell body
II. Axon
III. Dendrites
IV. Glial cells

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