Which of the following does NOT occur in a photoreceptor during exposure to light
A)membrane hyperpolarization
B)closure of Na⁺ channels in the outer segment
C)increased transmitter release from the synaptic terminal
D)decrease in cyclic GMP in the outer segment

Question

Quizplus · Accepted Answer

Exposure to light in a photoreceptor causes closure of Na⁺ channels in the outer segment, which leads to membrane hyperpolarization. This, in turn, causes a decrease in cyclic GMP levels in the outer segment, leading to a decrease in intracellular Ca²⁺ levels and decreased transmitter release from the synaptic terminal. Therefore, all options except C occur during exposure to light in a photoreceptor.

Which of the Following Does NOT Occur in a Photoreceptor