Photoreceptors are modified neurons.However,they differ from most neurons in the fact that ________.
A) photoreceptors do not have fluctuations in membrane potential
B) photoreceptors do not release neurotransmitters
C) photoreceptors are sensitive to energy changes in the external environment
D) photoreceptors will hyperpolarize when stimulated

Question

Quizplus · Accepted Answer

Photoreceptors differ from most neurons in that they will hyperpolarize when stimulated by light, rather than depolarize. This hyperpolarization is caused by the closure of ion channels in response to light, whereas depolarization in typical neurons is caused by the opening of ion channels in response to a neurotransmitter or other stimulus. Photoreceptors are also specialized to detect and respond to energy changes in the external environment, specifically in the form of light. While all neurons are sensitive to changes in their environment, photoreceptors are more specialized for this function.

Photoreceptors Are Modified Neurons