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Unformatted text preview: NAME ______ KEY _____ BIO 309D Homework #5 Sensory Mechanisms 1. Give a brief description of each of the four steps in a sensory pathway. Step in Sensory Pathway Description of step Sensory Reception Detection of stimulus by sensory receptor. Sensory Transduction Conversion of physical or chemical stimulus into an electrical/chemical signal Sensory Transmission Information about stimulus is passed to CNS via sensory neurons Sensation Awareness of stimulus once information reaches cerebral cortex. 2. Fill in the following chart outlining the five classes of sensory receptors. Receptor class Stimulus to which it responds Example of a sense that uses this class of receptor Mechanoreceptor Physical deformation of receptor. Touch, pressure, boy position, hearing Thermoreceptor Temperature Hot or cold Chemoreceptor Binding of specific chemical/molecule to receptor Smell, taste Photoreceptors Light Vision Pain Tissue damage or very strong stimuli Pain 3. Diagram the overall structure of the human eye. Diagram the overall structure of the human eye....
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- Spring '08