The following steps occur in rods when they are excited by a photon of light.Place them in the correct sequence.
1)Membrane sodium channels close.
2)cGMP is broken down.
3)The membrane hyperpolarizes and the rate of neurotransmitter release declines.
4)Transducin is activated.
5)Opsin is activated.
A) 1, 5, 2, 4, 3
B) 5, 4, 2, 1, 3
C) 3, 5, 2, 1, 4
D) 4, 5, 2, 1, 3
E) 1, 3, 4, 5, 2

Question

Quizplus · Accepted Answer

The correct sequence when rods are excited by a photon of light starts with the activation of opsin (5), followed by the activation of transducin (4), the breakdown of cGMP (2), the closure of membrane sodium channels (1), and finally, the hyperpolarization of the membrane leading to a decline in the rate of neurotransmitter release (3).

The Following Steps Occur in Rods When They Are Excited