Question

Write short notes on Synapse.

Answer 1

Synapse is a junction between the axon terminal of one neuron and the dendrite of next neuron. It is separated by a small gap known as synaptic cleft. There are two types of synapses.

(a) Electrical synapse

(b) Chemical synapse

In electrical synapses, the pre and post synaptic neurons lie in close proximity to each other. Hence, the impulse can move directly from one neuron to another across the synapse. This represents a faster method of impulse transmission. In chemical synapses, the pre and post synaptic neurons are not in close proximity. They are separated by a synaptic cleft. The transmission of nerve impulses is carried out by chemicals such as neurotransmitters.

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Answer 2

Synapse :-

1. Synapse is a junction between two adjacent neurons. It plays an important role in nerve transmission.
2. It consists of synaptic knob of preceding neuron, a gap Or functional bridge and dendrites of succeeding neuron.
3. During transmission of nerve impulse the neurotransmitters of synaptic knob is released into gap. It functions as temporary bridge for transmission.
4. After transmission the neuro transmitter breaks and recombines in synaptic knob.