When a person changes time zones suddenly, as in jet travel, the circadian rhythm:
A) adjust within a few hours.
B) is destroyed temporarily.
C) takes on a different periodicity.
D) becomes random.
E) needs entrainment.

Question

Quizplus · Accepted Answer

The circadian rhythm, which is the body's internal clock regulating the sleep-wake cycle among other physiological processes, requires entrainment to adjust to new time zones. This process involves exposure to environmental cues, such as light, to reset the body's internal clock to the local time, which can take several days.

When a Person Changes Time Zones Suddenly, as in Jet