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7 Cards in this Set
- Front
- Back
PNS
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All neural structures outside the brain and spinal cord. Includes sensory receptors, peripheral nerves, associated ganglia, and motor endings. Provides links to and from the external environment.
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Sensory Receptors
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Structures specialized to respond to stimuli. Activation of sensory receptors results in depolarizations that trigger impulses to the CNS. The realization of these stimuli, sensation and perception, occur in the brain.
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Receptor Classification by Stimulus Type: Mechanoreceptors
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Respond to touch, pressure, vibration, stretch, and itch.
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Receptor Classification by Stimulus Type: Thermoreceptors
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Sensitive to changes in temperature.
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Receptor Classification by Stimulus Type: Photoreceptors
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Respond to light energy (e.g. retina).
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Receptor Classification by Stimulus Type: Chemoreceptors
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Respond to chemicals (e.g. smell, taste, changes in blood chemistry)
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Receptor Classification by Stimulus Type: Nociceptors
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Sensitive to pain-causing stimuli
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