In order to return to the dark state, a photoreceptor must undergo recovery. Recovery involves many steps. How does each step of phototransduction return to the dark state? A. cGMP increase B. Inactivation of transducin C. Deactivation of rhodopsin D. Retinal configuration
When people get older the lens becomes stiffer and is not able to change shape as readily as when people are younger. Why would the inability of changing the angle of light through the lens cause objects (particularly those that are close) to become out of focus?