Page 59 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS
P. 59
DRAWING DIAGRAMS - PARTS - PROCEDURE
NEURON NERVE CELL Structure of Neuron
1. Neuron is the structural and functional unit of nervous system.
2. Neuron contains three distinct parts. They are :
1. Cell body / cyton / soma 2. Dendrites 3. Axon
3. Cell body has a large nucleus and cytoplasm.
4. The cytoplasm contains granular structures called Nissal Granules.
5. There are some projections arised from the cell body are called Dendrites.
6. Dendrites are short, Dendrites branched and more in number.
7. Dendrites are responsible for receiving the information from another neuron.
8. One projection of cyton is some what longer than remaining projection is called Axon.
9. Axons of some nerve cells are covered with myelin sheath.
10. The myelin sheath is made up of schwann cells chiefly consists of flatty materials.
11. Myelin sheath is interrupted at regular intervals called nodes of ranvier.
12. Axon is responsible for carry out the information from the cell body.
13. Axon ends with Nerve terminals.
SYNAPSE Structure of SYNAPSE
1. Synapse is the functional region of contact How to draw
pl. scan QR
between two neurons, where information from
one neuron is transmitted to another neuron.
2. It is a minute gap yet information is passed from one neuron to the
other through these gap either in the form of chemical or electrical
signal or both.
RAJU’S NATURAL SCIENCE ACADEMY
TEACHER AND STUDENT PUBLICATIONS, ONLY 10TH CLASS (103) PSR DIGITAL BOOKS (ONLINE&OFFLINE), ALL SUBJECTS (TM&EM) 9885678410
