After telling your friends about the role of light in the sleep-wake cycle,one of them asks about blind people.You mention:
A) that nearly all blind people have serious problems with their sleep-wake cycle
B) all blind people must use auditory cues of time passage
C) the pathway for vision and for circadian rhythms are separate
D) blindness causes profound disturbances in sleeping that must be treated with hormone injections

Question

Quizplus · Accepted Answer

The pathway for vision and the pathway for circadian rhythms are separate, which means that even blind individuals without light perception can still maintain a regular sleep-wake cycle through other cues, such as social cues or the use of melatonin supplements. While it's true that some blind individuals may experience sleep problems, it is not true that all blind people have serious problems with their sleep-wake cycle or that they need hormone injections to treat sleep disturbances.

After Telling Your Friends About the Role of Light in the Sleep-Wake