AP PSYCHOLOGY

Detailed explanation-1: -The circadian system modulates metabolic heat production to generate the body temperature rhythm, which challenges homeothermy but does not abolish it. Individual cells do not regulate their own temperature, but the relationship between circadian rhythms and metabolism at the cellular level is also discussed.

Detailed explanation-2: -Scientists have long known that body temperature fluctuates in warm-blooded animals throughout the day on a 24-hour, or circadian, rhythm, but the new study shows that temperature actually controls body cycles, said Dr. Joseph Takahashi, chairman of neuroscience at UT Southwestern and senior author of the study.

Detailed explanation-3: -What are circadian rhythms? Circadian rhythms are physical, mental, and behavioral changes that follow a 24-hour cycle. These natural processes respond primarily to light and dark and affect most living things, including animals, plants, and microbes. Chronobiology is the study of circadian rhythms.

Detailed explanation-4: -On average, an individual’s core body temperature varies from 36.5–37.5 °C (97.7–99.5 °F) over the course of a day. Your body temperature doesn’t remain constant, however, it fluctuates according to your circadian rhythm.

Detailed explanation-5: -Body temperature affects not only sleep onset, but also sleep quality and the time spent in different sleep stages. A higher core body temperature has been associated with a decrease in restorative slow-wave sleep. View Source and subjective sleep quality.