研究所、轉學考(插大)-普通生物學題庫下載題庫

39. In vertebrate photoreceptor cells, which of the following responses occurs when light stimulation is present?
(A)The photoreceptor becomes depolarized.
(B) The photoreceptor cell releases the neurotransmitter glutamate.
(C)The G-protein signaling activity of opsin is shut down in the photoreceptor cell.
(D) The cGMP-gated sodium channel on the plasma membrane of the photoreceptor cell closes.