Which of the following actions occurs when light strikes a photoreceptor cell of the retina?

Question

Quizplus · Accepted Answer

[Chapter 2, II C 4; Figure 2.5]. Light striking a photoreceptor cell causes
the conversion of 11-cis retinal to all-trans retinal; activation of a G protein called
transducin; activation of phosphodiesterase, which catalyzes the conversion of cyclic
guanosine monophosphate (cGMP) to 5?-GMP so that cGMP levels decrease; closure of
Na+ channels by the decreased cGMP levels; hyperpolarization of the photoreceptor; and
decreased release of glutamate, an excitatory neurotransmitter.

Which of the Following Actions Occurs When Light Strikes a Photoreceptor