AP PSYCHOLOGY

Detailed explanation-1: -Patterns of biological variation occurring on cycles less than 24 h are known as ultradian rhythms. Therefore, an ultradian rhythm is a recurrent period or cycle repeated throughout a 24-h day. In contrast, circadian rhythms (diurnal rhythm) complete one cycle daily.

Detailed explanation-2: -Ultradian rhythms are your body’s biological cycles that take place within 24 hours, which can include everything from a human heartbeat, to blinking, to digestion. While the more commonly known term “circadian rhythm” occurs over a 24-hour period, ultradian rhythms are shorter and are repeated during that time.

Detailed explanation-3: -Circadian rhythms are physical, mental, and behavioral changes that follow a 24-hour cycle.

Detailed explanation-4: -Examples of ultradian rhythms are blood circulation, pulse, heart rate, thermoregulation, blinking, micturition, appetite, arousal, etc.

Detailed explanation-5: -diurnal rhythms: the circadian rhythm synced with day and night. ultradian rhythms: biological rhythms with a shorter period and higher frequency than circadian rhythms.