Question

Draw a neat labelled diagrams of nerve cell and explain it ’s structure?​

Answer 1

Explanation:

The structure of neuron: Nerve cells or neurons are the structural and functional units of the nervous system. It consists of three major parts namely, Cell body, dendrites, Axon.

Cell Body: It is irregular in shape or polyhedral. The cell body contains cytoplasm and certain granular bodies called Nissles granules which contain a group of ribosomes for protein synthesis.

Dendrites: Dendrites are short fibres which branch repeatedly and protrude out of the cell body. They transmit electrical impulse towards the cyton.

Axon: They are long fibres arising from the cell body with the branched distal end.

It terminates in bulb-like structures called synaptic knob. It is filled with chemicals called neurotransmitters.

Parts of Axon:

a. Axoplasm: It is the cytoplasm of the axon.

b. Myelin sheath: It is made up of many layers of Schwann cells.

c. Neurilemma: The outermost layer of Schwann cells.

d. Nodes of Ranvier: These are gaps left by a myelin sheath.

solution

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Answer 2

Answer:

The structure of neuron : Nerve cells or neurons are the structural and functional units of the nervous system. It consists of three major parts namely, Cell body, dendrites, Axon.

Cell Body: It is irregular in shape or polyhedral. The cell body contains cytoplasm and certain granular bodies called Nissles granules which contain a group of ribosomes for protein synthesis.

Dendrites : Dendrites are short fibres which branch repeate and protrude out of the cell body. They transmit electrical impulse towards the cyton.

Axon : They are long fribres arising from the cell body with the branched distal end.

It terminates in bulb-like structures called synaptic knob. It is filled with chemicals called neurotransmitters.

Parts of Axon.

1. Axoplasm : It is the cytoplasm of the axon.
2. Myelin sheath : It is made up of many layers of Schwann cells.
3. Neurilemma : The outermost layer of Schwann cells.
4. Nodes of Ranvir : These are geps left by a mylin sheath.

Explanation:

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