Dr. Green is studying the role of rods in vision. Dr. Greenapplies a K+ channel blocker, which inhibitsK+ channels, to rods in a Petri dish. Before and afteradding the K+ channel blocker, Dr. Green also measuresthe concentration of neurotransmitters in the media of the Petridish and the membrane potential of the rods. What does Dr. Greenfind? (Select all options that apply)
(a) Glutamate secretion decreases after addition of theK+ channel blocker
(b) The membrane of rods depolarizes after addition of theK+ channel blocker
(c) Serotonin secretion increases after addition of theK+ channel blocker
(d) Action potentials are generated in rods after addition ofthe K+ channel blocker
(e) cGMP secretion increases after addition of the K+channel blocker
