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BIO203_SensoryPhysiol_1r1

BIO203_SensoryPhysiol_1r1 - Reflex Arcs A transducer...

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1 Sensory Physiology Receptors express transducer function. A transducer converts a signal of one modality into another modality: RECEPTOR STIMULUS OUTPUT(S) photoreceptor light mechanoreceptor displacement, pressure chemoreceptor chemical chemical thermoreceptor heat, cold electrical nociceptor pain, intense other (coded) electroreceptor electric fields magnetoreceptor magnetic field Sherwood, Klandorf & Yancey, Animal Physiology: From Genes to Organisms , Figure 5-1 Reflex Arcs increasing morphological and functional complexity Signals to brain receptor/transducer function retina taste cells lateral line & inner ear electro- and magnetoreceptors olfactory cells statocyst mechanoreceptors Sherwood, Klandorf & Yancey, Animal Physiology: From Genes to Organisms , Figure 6-2 receptor potential generator potential Receptor and Generator Potentials graded response stimulus strength Photoreception EYE PHOTORECEPTOR(S) light NERVOUS SYSTEM STIMULUS ANALYSIS CODED INFORMATION TRANSDUCTION
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