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Sensory System

All sensory pathways require a stimulus (eg light, sound, etc) and a sensory receptor. Each type of sensory receptor has an adequate stimulus that is unique to that receptor. Receptors, specialized nerve endings of sensory neurons, where sensory impulses originate. Sensory receptors are divided into 5 major types based on the type of stimulus to which they are most sensitive:

Chemoreceptorsrespond to chemical ligands
Mechanoreceptorsrespond to various forms of mechanical energy such as pressure, vibration, sound.
Thermoreceptorsrespond to temperature
Nociceptorsrespond to noxious (painful) stimuli
Photoreceptorsrespond to light
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Sensory SystemComments
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