Synapse, Biology


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





Most common



No direct contact between two terminal

Direct contact


Synaptic cleft 10-20 nm gap

Cleft absent gap may be of .02 nm


Terminal buttons present (diameter of 50 nm)

Terminal buttons absent


at the end of telodandria



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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