If you could monitor the activity from the photoreceptors of rods and cones in the retina during a dream, would you expect these cells to be producing electrical signals? Why?
A) No, because rods and cones never produce electrical signals.
B) Yes, because the rods and cones are reproducing images that are then sent to the brain.
C) No, because rods and cones only convert light energy into electrical signals.
D) Yes, because our eyes move during sleep, and this stimulates the rods and cones.

Question

Quizplus · Accepted Answer

Rods and cones are specialized cells in the retina that convert light energy into electrical signals, a process known as phototransduction. During dreams, there is no light entering the eyes to stimulate these cells, so they would not be producing electrical signals based on dream imagery. Dreams occur in the brain, independent of the photoreceptors' direct stimulation by light.

If You Could Monitor the Activity from the Photoreceptors of Rods