Sensory Receptors & Pathways

Sensory Receptors & Pathways - AP Biology Sensory...

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AP Biology Sensory Receptors & Pathways - All the stimuli are forms of energies and they are transformed so that the CNS can interpret in - Sensation and Perception 1) Sensation: the simple process of getting the stimuli – such as vision, smell 2) Perception: the process of interpreting the senses – such as action potential. - Sensory Pathway: Reception, Transduction, Transmission, and Perception 1) Sensory Reception = Specialized neurons or epithelial tissue (sensory receptors) 2) Sensory Transduction = Conversion of a stimulus to a change in the membrane potential of a sensory receptor (=Receptor Potential) a) Sensory receptors are very sensitive; therefore very small amount can affect b) Graded Potential; therefore magnitude varies with the stimuli 3) Transmission = The process of which the transduced sensory information is sent to the brain by releasing excitatory neurotransmitters a) The magnitude controls the frequency of the action potential b) This affects whether the action potential is frequency, not whether it is on-off
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This note was uploaded on 02/11/2012 for the course ZOOLOGY 152 taught by Professor Stephengammie during the Fall '11 term at Wisconsin.

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