Synapse is the space junction between two adjacent nerves. OR The point of contact between the terminal branches of axon of one neuron with the dendrite of another neuron is called synapse. It is a structure in a nervous system.

The electrical impulse causes the release of chemicals at the end of axon. These chemicals cross the synapse (gap) and start a similar electrical impulse in the dendrite of the next neuron. So this means that synapse allow the delivery of impulses from neurons to other cells such as muscle cells or glands.

Explanation: It takes place when a chemical i.e. neurotransmitter is diffused at the axon end points towards the dendrite point of another neuron. These stimulate the chemo- receptors present in Dendron and generate the signal further.