AP PSYCHOLOGY

Detailed explanation-1: -FALSE – it’s a 24-hour cycle which means ONE day.

Detailed explanation-2: -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.

Detailed explanation-3: -Normal people have a circadian rhythm that is slightly longer than 24 hours. Every day, morning light and other behaviors reset the sleep-wake clock to a 24-hour schedule. Without light and this clock resetting, people’s sleep time will drift later and later.

Detailed explanation-4: -Regulation of circadian period in humans was thought to differ from that of other species, with the period of the activity rhythm reported to range from 13 to 65 hours (median 25.2 hours) and the period of the body temperature rhythm reported to average 25 hours in adulthood, and to shorten with age.

Detailed explanation-5: -On average, the endogenous circadian rhythm is slightly longer than 24 hours. As such, daily adjustment or entrainment of the circadian clock is required to maintain alignment with the 24-hour environment, and light serves as one of the primary entraining signals.