While university students may sometimes be an exception,most humans sleep at night and are awake during the day.What maintains this relationship?
A)The eye relays messages to the brain about light levels,which synchronizes the circadian rhythms to the day-night cycle.
B)People get more exercise during daylight,which promotes alertness and wakefulness.
C)Ambient air temperature is cooler at night,which triggers the body to sleep.
D)Our internal biological clock is synchronized with the day-night cycle when we are born.

Question

Quizplus · Accepted Answer

The eye receives information about the light levels in the environment and relays this information to the brain, which then synchronizes the body's circadian rhythms to the day-night cycle. This process helps to maintain the relationship between sleeping at night and waking during the day.

While University Students May Sometimes Be an Exception,most Humans Sleep