Fred volunteered for a study in which he was deprived of all environmental time cues for a two-week period. It is very probable that:
A) he will experience episodes of cataplexy.
B) his circadian rhythms will be so disrupted that he will develop chronic jet lag symptoms.
C) he will experience microsleeps during the daytime and disruptions in his mood, mental abilities, reaction time, perceptual skills, and complex motor behaviors.
D) his circadian rhythms and internal clock will drift to their natural, or intrinsic, rhythm of about 24.2 hours.

Question

Quizplus · Accepted Answer

Without environmental time cues, the body's circadian rhythms tend to drift to their natural cycle, which is slightly longer than 24 hours, typically around 24.2 hours.

Fred Volunteered for a Study in Which He Was Deprived