๐ง Topic Summary
Stimulants and depressants both impact brain activity, but in opposite ways. Stimulants increase neural activity, leading to heightened alertness and energy. Common examples include caffeine and amphetamines. They primarily affect neurotransmitters like dopamine and norepinephrine.
Depressants, on the other hand, decrease neural activity, resulting in relaxation and sedation. Alcohol and benzodiazepines are typical examples. They often work by enhancing the effects of GABA, an inhibitory neurotransmitter.
๐ง Part A: Vocabulary
- ๐ค Term: Stimulant
- ๐ Definition: A substance that increases activity in the body and/or brain.
- ๐ค Term: Depressant
- ๐ Definition: A substance that reduces functional or nervous activity.
- ๐ค Term: Neurotransmitter
- ๐ Definition: Chemical messengers that transmit signals across a synapse.
- ๐ค Term: Dopamine
- ๐ Definition: A neurotransmitter associated with pleasure, motivation, and movement.
- ๐ค Term: GABA
- ๐ Definition: An inhibitory neurotransmitter that reduces neuronal excitability.
๐ Part B: Fill in the Blanks
__________ increase brain activity, while __________ decrease it. __________ like dopamine are affected by stimulants, and __________ like GABA are enhanced by depressants. Understanding these differences is key to understanding how these substances impact the __________ nervous system.
(Answer choices: Stimulants, Depressants, Neurotransmitters, Central)
๐ค Part C: Critical Thinking
If someone is experiencing anxiety, would a stimulant or a depressant be more likely to provide short-term relief? Explain your reasoning.