Nerve ending
Nerve Ending
A nerve ending (pronunciation: /nɜːrv ˈɛndɪŋ/) is a specialized structure at the end of a nerve fiber that transmits signals to other cells.
Etymology
The term "nerve ending" is derived from the Latin words "nervus" meaning "sinew, nerve" and "end" meaning "the final part of a place or period of time."
Definition
Nerve endings are the key functional units in the nervous system, responsible for receiving and transmitting signals to and from the brain. They are found throughout the body and are involved in a variety of functions, including sensation, movement, and the regulation of bodily functions.
Types of Nerve Endings
There are several types of nerve endings, each with a specific function:
- Free nerve endings: These are the most common type of nerve ending, and are involved in the sensation of pain, temperature, and pressure.
- Encapsulated nerve endings: These nerve endings are surrounded by a capsule of connective tissue, and are involved in the sensation of touch and pressure.
- Specialized nerve endings: These nerve endings are found in the sensory organs, and are involved in the sensation of sight, hearing, taste, and smell.
Related Terms
- Neuron: The basic working unit of the nervous system, which transmits information to other nerve cells, muscle, or gland cells.
- Synapse: The junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.
- Neurotransmitter: Chemicals that transmit signals from a neuron to a target cell across a synapse.
- Sensory receptor: Specialized nerve endings that respond to changes in the environment by generating electrical signals.
External links
- Medical encyclopedia article on Nerve ending
- Wikipedia's article - Nerve ending
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