Diurnal rhythms are the same as circadian rhythms?
Diurnal rhythms refer specifically to biological processes that occur over a 24-hour period, such as the sleep-wake cycle, whereas circadian rhythms are internally driven rhythms that follow a roughly 24-hour cycle but can be influenced by external factors. While diurnal rhythms are a subset of circadian rhythms, circadian rhythms encompass a broader range of biological processes beyond just daily cycles.