AP PSYCHOLOGY

Detailed explanation-1: -C. Explanation: The “circadian rhythm” is the cycling of biological processes according to time of day or night. In humans, biological variables like body temperature and mental alertness generally rise throughout the day and then fall at night, preparing the body for sleep (see pages 231-232 for more). C.

Detailed explanation-2: -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-3: -The circadian clock has an internally driven 24-hour rhythm that tends to run longer than 24 hours but resets every day by the sun’s light/dark cycle. Taking melatonina supplements can also shift the timing of the body’s “clock.” Some people use melatonina as a sleep aid: it has a mild sleep-promoting effect.

Detailed explanation-4: -Your internal clock, called a circadian clock, cycles about every 24 hours. These repeating 24-hour cycles are called the circadian rhythm. Your body tries to align your sleep-wake cycle to cues from the environment, such as when it gets light or dark outside, when you eat, and when you are physically active.

Detailed explanation-5: -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. They can affect sleep, body temperature, hormones, appetite, and other body functions.