Question

5. For each substance, indicate ↑ if activity will increase & ↓ if the activity will decrease.
   1. Nicotine stimulates nicotinic acetylcholine receptors                                                            ↑             ↓
   2. Amphetamine blocks reuptake of monoamines                                                          ↑          ↓
   3. Clonidine stimulates norepinephrine autoreceptors                                                   ↑          ↓
   4. Marijuana excites negative-feedback presynaptic receptors                                      ↑          ↓
   5. Selegiline blocks enzyme MAO that breaks down monoamines                               ↑          ↓
   6. Yohimbine inhibits norepinephrine autoreceptors                                                     ↑          ↓
   7. Haldol blocks dopamine receptors from activation                                                    ↑          ↓
   8. L-DOPA is the precursor substance to dopamine                                                      ↑          ↓
   9. Botox inhibits Ca²⁺ from opening vesicles that contain acetylcholine                       ↑          ↓

PCPA inhibits enzyme tryptophan hydroxylate needed to create serotonin

Answer 1