hich of the following is true of the effect of caffeine on the nervous system?Multiple ChoiceIt increases relaxation.It increases attentiveness.It causes a drop in heart rate.It increases reaction time.
Question
hich of the following is true of the effect of caffeine on the nervous system?Multiple ChoiceIt increases relaxation.It increases attentiveness.It causes a drop in heart rate.It increases reaction time.
Solution
The correct answer is: It increases attentiveness.
Caffeine is a stimulant that affects the central nervous system. It blocks the neurotransmitter adenosine, which promotes sleep and relaxation, leading to increased alertness and wakefulness. Therefore, it does not increase relaxation or cause a drop in heart rate. In fact, it can increase heart rate. It also doesn't increase reaction time, but can actually decrease it, making you react more quickly.
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