Which of the following statements about circadian rhythms in humans is MOST accurate?
A) Humans generally show no indication of having circadian rhythms.
B) Circadian rhythms are apparently a uniquely human development.
C) Circadian rhythms in humans tend to function on a 30-day cycle.
D) Circadian rhythms in humans actually appear to be regulated by several internal clocks.

Question

Quizplus · Accepted Answer

Circadian rhythms in humans are regulated by several internal clocks, including the master clock in the hypothalamus and peripheral clocks in various organs throughout the body. Humans exhibit a 24-hour circadian rhythm that affects many physiological and behavioral processes, such as sleep-wake cycles, hormonal fluctuations, and metabolism. There is no evidence to support choices A and B, and choice C is incorrect as the typical human circadian rhythm is about 24 hours, not 30 days.

Which of the Following Statements About Circadian Rhythms in Humans