What substance slows the speed of nerve impulses?

What substance slows the speed of nerve impulses?

• A. Alcohol
• B. Caffeine
• C. Stimulants
• D. Nerve gases

Answer: (A)

Alcohol slows nerve impulses because it acts as a depressant on the central nervous system. It enhances the inhibitory effects of the neurotransmitter GABA and dampens excitatory signals, which reduces how quickly neurons fire and how fast signals are transmitted between neurons. This produces slower reflexes, poorer coordination, and dulled sensation. Caffeine and other stimulants, in contrast, boost neural activity and speed up signaling, while nerve gases disrupt signaling in a way that doesn’t simply slow normal impulse transmission. So the substance that slows nerve impulses is alcohol.

Alcohol slows nerve impulses because it acts as a depressant on the central nervous system. It enhances the inhibitory effects of the neurotransmitter GABA and dampens excitatory signals, which reduces how quickly neurons fire and how fast signals are transmitted between neurons. This produces slower reflexes, poorer coordination, and dulled sensation. Caffeine and other stimulants, in contrast, boost neural activity and speed up signaling, while nerve gases disrupt signaling in a way that doesn’t simply slow normal impulse transmission. So the substance that slows nerve impulses is alcohol.