Question

question 1 stimulants ___ the nervous system, while depressants ____ the nervous system slow down, speed up speed up, slow down activate, suppress change, relax

Explanation:

Stimulants are substances that increase the activity of the nervous system, so they speed it up or activate it. Depressants reduce the activity of the nervous system, meaning they slow it down or suppress it. Among the options, "speed up, slow down" (and also "activate, suppress" is correct in terms of function, but "speed up, slow down" is a more direct description of the rate of nervous system activity. However, both "speed up, slow down" and "activate, suppress" are correct in concept, but looking at the options, the most accurate in terms of the typical description of their effects on the nervous system's rate of activity is "speed up, slow down" and also "activate, suppress" is correct. Wait, let's re - evaluate: Stimulants like caffeine or amphetamines increase the activity of the nervous system (speed it up/activate), and depressants like alcohol or benzodiazepines decrease the activity (slow it down/suppress). So both option B (speed up, slow down) and option C (activate, suppress) are correct in meaning. But maybe the question expects the more common phrasing related to the rate of the nervous system's function. Wait, no, let's check the options again. The options are:

1. slow down, speed up – incorrect, as stimulants don't slow down.

1. speed up, slow down – correct, as stimulants increase (speed up) nervous system activity, depressants decrease (slow down) it.

1. activate, suppress – also correct in terms of the effect (stimulants activate, depressants suppress), but maybe the question is looking for the more direct description of the rate.

1. change, relax – incorrect, as stimulants don't just "change" in a vague way, and depressants' main effect is not just "relax" (they suppress activity, relaxation is a by - product in some cases).

So the correct options are B. speed up, slow down and C. activate, suppress? Wait, no, let's check the question again. Wait, maybe the question has a single correct answer. Wait, in the context of typical drug - effect descriptions, stimulants "speed up" the nervous system (increase heart rate, brain activity, etc.), depressants "slow down" (decrease heart rate, brain activity, etc.). So option B is correct. Also, "activate" and "suppress" are also correct, but maybe the question's intended answer is B.

Answer:

B. speed up, slow down; C. activate, suppress (Note: If we have to choose one, based on the common way of describing the effect on the rate of nervous system function, B is more direct. But both B and C are correct in terms of the effect on the nervous system. However, looking at the options, the most appropriate answer is B. speed up, slow down)