If left in a place with no time or light cues,your sleep-wake cycle would:
A) remain at 24 hours
B) change to a little more than 24 hours
C) keep constant at 12 hours
D) remain unchanged at about 4 hours

Question

Quizplus · Accepted Answer

The sleep-wake cycle would change to a little more than 24 hours because humans have an internal biological clock (circadian rhythm) that typically runs longer than 24 hours in the absence of external time cues. This is known as free-running circadian rhythm. Studies on individuals isolated from time cues have found that their sleep-wake cycle tends to become longer by approximately 30-60 minutes each day. Therefore, the best choice is B - change to a little more than 24 hours. Choices A, C, and D are incorrect.

If Left in a Place with No Time or Light