Definition

Noun: A sensory receptor that detects stimuli originating from the external environment, outside the body. These receptors are specialized nerve endings that gather information about the outside world, such as light, sound, temperature, touch, and smell.

Examples of Usage

• The eye contains photoreceptors, which are exteroceptors sensitive to light.
• Pain from a cut on the skin is detected by exteroceptors.
• In sensory physiology, exteroceptors are contrasted with interoceptors, which sense internal bodily conditions.

Advanced Usage

• Exteroceptive senses: This term refers collectively to the senses that rely on exteroceptors, such as vision, hearing, touch, taste, and smell. These are the primary senses for interacting with and perceiving the external world.
• Exteroceptive feedback: Information from exteroceptors is crucial for motor control and coordination, allowing an organism to adjust its movements based on environmental feedback.

Variants and Related Words

• Exteroceptive (adjective): Pertaining to exteroceptors or the perception of external stimuli.
  • Exteroceptive information is processed in different regions of the brain.
• Interoceptor (noun): A receptor that responds to stimuli inside the body (e.g., from internal organs).
• Proprioceptor (noun): A receptor that responds to internal stimuli related to body position and movement (e.g., in muscles and joints).

Synonyms

• External receptor
• External sense organ (though this refers to the whole organ, not just the receptor cells)

Related Concepts

• Sensory receptor: The broader category that includes exteroceptors, interoceptors, and proprioceptors.
• Stimulus: A detectable change in the internal or external environment to which a receptor responds.
• Afferent nerve: A nerve that carries sensory information receptors (like exteroceptors) the central nervous system.

Noun

1. any receptor that responds to stimuli outside the body