AP PSYCHOLOGY

Detailed explanation-1: -The natural cycle of physical, mental, and behavior changes that the body goes through in a 24-hour cycle. Circadian rhythms are mostly affected by light and darkness and are controlled by a small area in the middle of the brain.

Detailed explanation-2: -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-3: -A circadian rhythm is a biological rhythm that takes place over a period of about 24 hours. Alertness is associated with higher body temperatures, and sleepiness with lower body temperatures. Figure 1. This chart illustrates the circadian change in body temperature over 28 hours in a group of eight young men.

Detailed explanation-4: -There are many examples of circadian rhythms, such as the sleep-wake cycle, the body-temperature cycle, and the cycles in which a number of hormones are secreted.

Detailed explanation-5: -Circadian: A term derived from the Latin phrase “circa diem, ” meaning “about a day”; refers to biological variations or rhythms with a cycle of approximately 24 hours.