Under conditions in which volunteers are deprived of all environmental time cues:
A) they will experience strong symptoms of jet lag.
B) they will gravitate to roughly a 24.2-hour day.
C) their emotional, intellectual, and physical biorhythms become closely synchronized with one another.
D) their circadian rhythms will become precisely entrained to a 24-hour day.

Question

Quizplus · Accepted Answer

Under conditions without environmental time cues, humans tend to follow a natural circadian rhythm that is slightly longer than 24 hours, typically around 24.2 hours.

Under Conditions in Which Volunteers Are Deprived of All Environmental