nerve ending

Thân thiện

A scientist carefully examines a nerve ending under a high-powered microscope.

Definition

Noun: 1. The terminal structure of an axon that does not end at a synapse: A nerve ending is the specialized, often branched, tip of a nerve fiber (axon) that is designed to either receive stimuli (as in sensory receptors) or release neurotransmitters to affect other cells (as in effector endings). It is the point where the neuron interfaces with its environment, other than at a standard synapse between two neurons.

Usage

The term "nerve ending" is used in biological, medical, and anatomical contexts to describe the physical endpoint of a neuron's axon. It is a countable noun.

Examples

• Noun:
  • The burning sensation is caused by the direct stimulation of pain-sensitive nerve endings in the skin.
  • Specialized nerve endings in the muscles, called proprioceptors, provide the brain with information about body position.
  • The anesthetic works by temporarily blocking signals from the nerve endings.

Advanced Usage

• "Free nerve ending": A common type of simple, unencapsulated nerve ending that is sensitive to pain, temperature, and crude touch.
  • Free nerve endings are the most abundant type of sensory receptor in the skin.

Variants and Related Words

• Nerve terminal (n): Often used synonymously with "nerve ending," particularly for the presynaptic ending that releases neurotransmitters.
• Sensory receptor (n): A structure, which often includes a nerve ending, that detects specific types of stimuli (e.g., touch, temperature).
• Effector ending (n): A nerve ending that transmits signals to a muscle or gland to cause a response.

Synonyms

• Neurite terminal: A more general technical term for the ending of a neuronal process.
• Axon terminal: Specifically denotes the ending of an axon, often used when it forms a synapse.

Related Phrases

• To stimulate/irritate nerve endings: To activate or aggravate the nerve endings, causing a sensation.
  • The spicy compound capsaicin directly stimulates the nerve endings responsible for sensing heat.
• Nerve ending density: Refers to how many nerve endings are present in a given area of tissue.
  • The high nerve ending density in the fingertips explains their extreme sensitivity.

Học thuật

Noun

1. the terminal structure of an axon that does not end at a synapse

Từ đồng nghĩa

• nerve end