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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)
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