Question

STRUCTURE OF NEURON LABEL THE PART .​

Answer 1

Explanation:

Axon terminal

Dendrites

mylein sheeth

cell body

nucleus

nissl's granules

Schwann cell

axon

node of tanvier

synaptic knob

Answer 2

Neuron :

A neuron is the structural and functional unit of the nervous system. A neuron consists of three basic parts,

1. Cyton or Cell body or Perikaryon
2. Dendrites
3. Axon.

Cyton :

• It has a central nucleus with abundant cytoplasm called neuroplasm.
• The cytoplasm has large granular and the other cell organelles like mitochondria, ribosomes, lysosomes and endoplasmic reticulum.
• Neurons do not have the ability to divide.
• Several neurofibrils help in transmission of nerve impulses to and from the cell body.

Dendrites :

• These are the numerous branched cytoplasmic processes that project from the surface of the cell body.
• They conduct nerve impulses towards the cyton.
• The branched projections increase the surface area for receiving the signals from other nerve cells.

Axon :

• The axon is a single elongated slender projection.
• The end of axon terminates as knob like swellings called synaptic knob. It carries impulse away from cyton.
• Axolemma : Plasma membrane of axon.
• Axoplasm : The cytoplasm if axon.

Myelin Sheath :

• The protective sheath of axon.
• It is covered by a layer of Schwann cells called Nuerilemma.
• It breaks at intervals by depressions called Nodes of Ranvier.
• It acts as an insulator and ensures rapid transmission of nerves impulses.