Jet lag may be best explained by the

A) elevation of serotonin in the prefrontal cortex.
B) dramatic changes in environmental stimuli.
C) dietary changes.
D) effect of time shifts on the circadian rhythm.

Circadian Rhythm

The natural, internal process that regulates the sleep-wake cycle and repeats roughly every 24 hours.

Serotonin

A neurotransmitter involved in many functions, including mood regulation, appetite, and sleep. Imbalances in serotonin levels are associated with depression and other mood disorders.

Environmental Stimuli

External prompts or signals from the environment that can influence an individual's behavior, responses, or perceptions.