Synapse, Biology

SYNAPSE -

The point where 2 neurons combine is synapse.

It is of 2 types -

(i) Axosomic (between axon & cyton)

(ii) Axodendric (between axon & dendron)

Axon is termed as pre synaptic terminal while dendron is termed as post synaptic terminal.

Synapse name is given by Sir Charles Sherington.

Synapse is of 2 types -

1. Chemical             2. Electrical

S.NO.

CHEMICAL

ELECTRICAL

1.

Most common

Uncommon

2.

No direct contact between two terminal

Direct contact

3.

Synaptic cleft 10-20 nm gap

Cleft absent gap may be of .02 nm

4.

Terminal buttons present (diameter of 50 nm)

Terminal buttons absent

 

at the end of telodandria

 

5.

Transmission of impulse mediated by chemical

Transmission of impulse in electrical manner

 

called neurotransmitters

without neurotransmitters

1131_structure of synapse.png

Posted Date: 10/3/2012 2:28:15 AM | Location : United States







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