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The Science of Caffeine

Level 6 ⭐⭐⭐⭐⭐⭐

👣 Focus on Key Vocabulary.

Example:
A substance that raises levels of physiological or nervous activity in the body.
Molecule ❌ Stimulant ✅

Which term refers to a substance that slows down or stops a particular chemical reaction?

Which term relates to a chemical substance that is released at the end of a nerve fiber, causing the transfer of the impulse to another nerve fiber?

Which term is used to describe something harmful or poisonous?