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Assertion : A neuron is a microscopic st...

Assertion : A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon.
Reason : Short fibres which branch repeatedly and project out of the cell body are called axons.

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.

Text Solution

Verified by Experts

The correct Answer is:
C
A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon.
Short fibres which branch repeatly and project out of the cell body are called dendrites.
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A neuron is a microscopic structure composed of three major parts, namely, cell body, dendrites and axon. There are two types of axons, namely, myelinated, and nonmyelinated. Which of the following is true for nerve ? i. The myelinated nerve fibres are enveloped with Schwann cells ii. Schwann cells form a myelin sheath around the axom iii. The gaps between two adjacent myelin sheaths are called nodes of Ranvier. iv.Myelinated nerve fibres are found in autonomous and the somatic neural systems v. Unmyelinated nerve fibre is enclosed by a Schwann cell that does not form a myelin sheath around the axon. vi. Unmyelinated nerve fibre is commonly found in spinal and cranial nerves

Read the following statements about the nervous system: I. The neural organisation in Hydra is composed of a network of neurons. II. A neuron is a macroscopic structure composed of three major parts III. Nissl's granules are present in dendrites and cell body. IV. The axons transmit nerve impulses towards the cell body. How many from the many from the above is/are correct ?

Dendrites and Axon are parts of which cell ?

Which part of a neuron carries impulses towards the cell body ?

(a) Which parts of the body are composed of nerve cells? (b) Write main function of neuron.

Assertion :- Neuron is the longest cell of human body. Reason:- It contain dendrites and axon.

Assertion (A): Axon conducts the electrical impulses away from the cell body of the neuron. Reason (R): The membrane of neuron provides the passage for the movement of ions.

A2Z-NEURAL CONTROL AND COORDINATION-Section B : Assertion-reasoning Questions
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