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It Is Bedtime, as Far as the Brain Is Concerned

question 444

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It is bedtime, as far as the brain is concerned, when levels of which of the following rise late in the evening?


Definitions:

Disease X

An unnamed pathogen designated by the World Health Organization as potentially causing a future epidemic.

Smokers

Individuals who regularly inhale tobacco smoke, particularly from cigarettes.

Nonsmokers

Individuals who do not smoke cigarettes or use tobacco products, often assessed in studies for health risk comparisons.

Exposure

refers to the contact with a disease-causing factor or the amount of the factor that impinges upon a person or group.

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