Intro
Agonistic Drug Effects:
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Antagonist Drug Effects:
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Part 1: Image-Mapped Tutorial
Part 2: Matching Self-Test
Part 3: Multiple-Choice Self-Test
3. An additional class of drugs increases the release of neurotransmitters from the presynaptic membrane. Examples of this mechanism include botulinum toxin and amphetamine, which increase the release of acetylcholine and norepinephrine, respectively. Presynaptic facilitative heteroreceptors are located at axoaxonic synapses. These specialized receptors open calcium ion channels when stimulated, and thereby induce the release of neurotransmitter molecules from storage vesicles.