Examlex
Which of the following is a function of the insect tracheal system?
Caffeine
A stimulant found in coffee, tea, and various foods and drinks that affects the central nervous system, increasing alertness.
Widely Used Drug
A substance that is commonly consumed or applied for its physiological and psychological effects.
Physical Dependence
A physiological state of adaptation to a substance, manifested by the development of withdrawal symptoms when the substance is reduced or stopped.
Caffeine
A stimulant of the central nervous system present in coffee, tea, and various foods and drinks, known to enhance alertness and reduce fatigue.
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