Problem
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) Based on what we talked about in class, explain how photoreceptors in the light can lead to excitation of some bipolar cells and inhibition of others.