A circadian rhythm is a
A) cycle of hormone secretion that repeats every week.
B) cycle of sleeping and waking that occurs approximately every 24 hours.
C) progressive decline in synchronous brain activity during sleep.
D) set of slow waves seen during stage 3 sleep.

Question

Quizplus · Accepted Answer

A circadian rhythm is a cycle of sleeping and waking that occurs approximately every 24 hours. This cycle is regulated by the body's internal clock, which is influenced by external factors such as light and temperature. Hormone secretion and slow waves seen during specific stages of sleep are part of the circadian rhythm, but they do not define it.

A Circadian Rhythm Is a