1) Give an example of a basic sensory receptor type that is responsible for a la
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1) Give an example of a basic sensory receptor type that is responsible for a large number of sensory modalities, and list the senses it transduces. Explain how a single type of receptor can acquire information about the world from such fundamentally different stimuli. 2) You are making an electrical recording from a sensery receptor, stimulating it by vibrating at 500 indentations/sec, but varying the intensity (depth of indentation). Make an intesity/ response curve from the following data: 30 micrometer indentation 50 micrometer indentation time (1 sec) 70 micrometer indentation time-> (1 sec) 90 micrometer indentation time-> (1 sec) 110 micrometer indentation time ->(1 sec) time ->(1 sec) time-> (1 sec) 10 Estimate the threshhold: 100 indentation depth micrometers) 3) Now you collect a series of intesity/response curves, varying the indentations per second. Make a tuning curve. Estimate the sweet spot 101 200 inds/sec 300 inds/sec 101 400 inds/sec 100 2 50 100 0 50 100 0 50 100 101 700 inds/sec 800 inds/sec 50 101 600 inds/sec 50 100 50 100 0 500 50 indentation depth 100 Frequency (indentations/sec) 100 indentation depthindentation depth micrometers) micrometers) (micrometers)Explanation / Answer
1) An example of basic sensory receptor that is responsible for large number of sensory modalities is Pacinian corpuscle (mechanoreceptor). The different sensory modalities that can be transduced by this receptor include,
These different sensory stimuli cause different patterns of distortions in the cell membrane of Pacinian corpuscle and these patterns are perceived as different sensory modalities.
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