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    Variation in Cells and Receptors

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    Hi, I need assistance with the following biology questions:
    1. Distinguish between tonic and phasic receptors? Which type is likely to be a fast-adapting receptor? Which type is likely to be a slow-adapting receptor?
    2.Why are the ependymal cells so important in the formation and circulation of CSF?

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    Solution Preview

    Here is a reference on tonic and phasic receptors: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1302995/

    Sensory receptors detect environmental stimuli and differ between sensory organs; however, most are of two basic types: tonic and phasic. Tonic receptors display sustained firing. They respond to sustained stimuli such as pressure on the skin by firing at a regular rate. A change in the level of pressure will result in a ...

    Solution Summary

    The variation in cells and receptors are examined.