Question

The human sleep cycle repeats itself about every?

1) 4 hours
2) 30 minutes
3) 90 minutes
4) 2 1/2 hours

Answer 1

The human sleep cycle repeats itself about every 90 minutes, and these cycles are part of our circadian rhythms which are regulated by the biological clock in our brains, influenced by light.

Step-by-step explanation:

The human sleep cycle repeats itself about every 90 minutes. This cycle is part of the larger circadian rhythms that govern our daily biological patterns. During the sleep cycle, a person goes through various stages, including Rapid Eye Movement (REM) sleep and Non-REM sleep, which are both essential for learning and memory.

Circadian rhythms, guided by the biological clock in our brain, help to regulate these sleep cycles and are influenced by external cues like light.