The following steps occur in rods when they are excited by photons of light. What is the proper sequence for these steps?
1) Membrane sodium channels close.
2) Increased phosphodiesterase breaks down cGMP.
3) Retinal changes from the 11-cis form to the 11-trans form.
4) The membrane hyperpolarizes and the rate of neurotransmitter release declines.
5) Opsin activates transducin.
6) Opsin activation occurs.

Question

Quizplus · Accepted Answer

The proper sequence for the steps that occur in rods when they are excited by photons of light is:
1) Retinal changes from the 11-cis form to the 11-trans form.
2) Opsin activation occurs.
3) Opsin activates transducin.
4) Increased phosphodiesterase breaks down cGMP.
5) Membrane sodium channels close.
6) The membrane hyperpolarizes and the rate of neurotransmitter release declines.

Therefore, the best choice is B, as it lists the steps in the correct order.

The Following Steps Occur in Rods When They Are Excited