sensory receptor
Noun: An organ or specialized cell structure that contains nerve endings capable of detecting and responding to specific types of physical or chemical stimulation from the external or internal environment. These receptors convert stimuli into neural signals that are sent to the brain for processing.
The term "sensory receptor" is used to describe the biological structures that are the initial point of contact for sensory information. It is a technical term common in biology, physiology, and neuroscience contexts. - It functions as a countable noun (e.g., a sensory receptor, sensory receptors). - It is often modified by the specific sense it serves (e.g., visual sensory receptor, tactile sensory receptor).
Basic Usage:
- The skin contains many sensory receptors for touch, pressure, and temperature.
- When a sensory receptor is stimulated, it generates an electrical signal.
With Modifiers:
- The retina of the eye houses the sensory receptors for light.
- Damage to the olfactory sensory receptors can lead to a loss of smell.
Sensory Receptor Cell: A more specific term emphasizing the cellular nature of many receptors.
- Each hair cell in the cochlea is a sensory receptor cell for sound.
Sensory Receptor Organ: Refers to a larger structure composed of multiple receptor cells and supporting tissues.
- The taste bud is a sensory receptor organ located on the tongue.
- Receptor (noun): A more general term that can refer to sensory receptors or to molecules (e.g., hormone receptors) that bind specific substances.
- Transducer (noun): A device or, in biology, a structure (like a sensory receptor) that converts one form of energy to another.
- Effector (noun): An organ or cell that acts in response to a stimulus, often contrasted with a receptor.
- Sense organ: While a sense organ (like the eye) contains sensory receptors, it is a larger structure. The terms are related but not perfectly synonymous.
- Detector: A more general, non-biological term for something that identifies the presence of a stimulus.
Sensory transduction: The process by which a sensory receptor converts a stimulus into an electrical signal.
- Sensory transduction is the first step in perceiving our environment.
Sensory adaptation: The decrease in sensitivity of a sensory receptor after prolonged stimulation.
- Sensory adaptation explains why you stop noticing a constant background noise.
Sensory neuron: The nerve cell that carries signals from a sensory receptor to the central nervous system. The receptor may be a specialized ending of this neuron or a separate cell that synapses with it.
-
an organ having nerve endings (in the skin or viscera or eye or ear or nose or mouth) that respond to stimulation
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