nerve ending

A nerve ending is the terminal structure of a nerve axon, which is a long projection of a nerve cell (neuron). These endings are crucial for transmitting information within the nervous system.1

Neurons, the basic units of the nervous system, consist of a cell body (soma), an axon, and dendrites. The axon conducts electrical impulses away from the soma. At the axon's terminal, specialized structures called synapses form junctions with other neurons or muscle cells.2

When a stimulus acts on a sensory receptor, it's converted into an electrical response called a receptor potential. If this potential reaches a certain threshold, it generates a nerve impulse (action potential) that travels along the axon to the nerve ending. At the synapse, this impulse can trigger the release of chemical neurotransmitters, which then signal to the next cell. Nerve endings are also where receptors are located, allowing organisms to sense external and internal environments, such as touch, temperature, and pain.32456