Which term describes a drug that increases the action of the CNS, heart, and other organs?

• A. Carbon monoxide
• B. Nicotine
• C. Leukoplakia
• D. Stimulant

Answer: (D)

The main idea here is recognizing the term for a drug that increases activity in the central nervous system, heart, and other organs. A stimulant is a substance that speeds up brain and body functions, leading to heightened alertness, faster heart rate, and more energy. Nicotine is an example of a stimulant found in tobacco products, which is why it can raise alertness and heart rate. Carbon monoxide, by contrast, is a toxic gas that impairs oxygen delivery to tissues, not something that increases bodily activity. Leukoplakia is a mouth patch condition, not a drug category. So the best term for a drug that boosts activity across the CNS and other organs is stimulant.