In human beings, certain chemicals which cross the synapse between nerve cells are released from

In human beings, the transmission of nerve impulses involves both electrical and chemical signals. An electrical impulse travels along the axon to its end, where it triggers the release of specific chemicals known as neurotransmitters [1]. These chemicals are stored in synaptic vesicles located within the axon terminals, also referred to as nerve endings. When an action potential reaches these nerve endings, the vesicles fuse with the cell membrane, releasing the neurotransmitters into the synaptic cleft or gap [1]. These chemicals then diffuse across the synapse to bind with receptors on the dendrite of the adjacent neuron, initiating a new electrical impulse [1]. While the cell body (soma) is responsible for synthesizing many of these chemicals, the actual release into the synapse occurs exclusively from the nerve endings of the presynaptic neuron.

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 6: Control and Coordination > 6.1 ANIMALS – NERVOUS SYSTEM > p. 101