Our sleep-wake cycle follows a(n) ________rhythm.

A) infradian
B) diurnal
C) circadian
D) ultradian

Sleep-Wake Cycle

Refers to the 24-hour daily rhythm that governs our sleep and wakefulness, largely controlled by our body's internal clock and external cues like light and darkness.

Circadian Rhythm

A cycle of bodily rhythm that occurs over a 24-hour period.

Infradian

Pertaining to biological rhythms with a frequency of less than one cycle in 24 hours, such as menstrual cycles.