Transduction of a stimulus usually causes depolarization of a sensory receptor. a.)In most receptors, what is the chemical basis for this depolarization (that is, what is the specific mechanism for the change)? b.)How is a photoreceptor different from other receptors in terms of its membrane potential?  c.) Explain how photoreceptors in the light can lead to excitation of some bipolar cells and inhibition of others

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