Intro
Agonistic Drug Effects: 1 | 2 | 3 | 4 | 5 | 6
Antagonist Drug Effects: 7 | 8 | 9 | 10 | 11

Part 1: Image-Mapped Tutorial
Part 2: Matching Self-Test
Part 3: Multiple-Choice Self-Test

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2. Another step in the transmission process which when altered may facilitate the effects of a neurotransmitter is enzymatic breakdown. A drug may decrease the levels or decrease the effectiveness of an enzyme and thereby increase levels of the neurotransmitter it normally degrades.