PY 101, week 3
PY 101, week 3 PY 101
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This 2 page Class Notes was uploaded by Ashley Bartolomeo on Wednesday August 31, 2016. The Class Notes belongs to PY 101 at University of Alabama - Tuscaloosa taught by TBA in Fall 2016. Since its upload, it has received 9 views. For similar materials see Intro to Psychology in Psychology (PSYC) at University of Alabama - Tuscaloosa.
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Date Created: 08/31/16
Drugs and Alcohol Drugs Affect Neurotransmission Imitate, stimulate or block neurotransmitters Produce more or less neurotransmitters 1. Increase number of action potentials 2. Release neurotransmitters from vesicles with or without an action potential 3. Block reuptake or block receptors 4. Prevent vesicles from releasing the neurotransmitter Alcohol Inhibits the effects of glutamate in the cerebellum (balance) Prevents dopamine from breaking down in the nucleus accumbens, which is in basal ganglia Increases levels of norepinephrine Alcohol binds to GABA receptors causing the cell to hyperpolarize (not fire) Decreased activity in the prefrontal cortex (judgment) and hippocampus (memory) Increases dopamine levels which are used for reward and motivation say drinking is rewarding which in turn makes you want to do it again Alcohol depresses brain activity Marijuana THC increases dopamine THC encourages cannabinoid receptors to mimic other neurotransmitters in the limbic system, cerebellum and basal ganglia o Decreases acetylcholine in hippocampus o Decreasing action of other neurotransmitters in those areas Rohypnol (A Benzodiazepine) Trade name for flunitrazepam (aka “date rape drug” or “roofies” Depress the central nervous system by binding to GABA receptors o This increases the chance GABA binds to the receptor o GABA is an inhibitory signal Potentially lethal when mixed with alcohol or other depressants Treatment: SSRI (Prozac) Selective serotonin reuptake inhibitors Widely used because it treats many disorders, such as depression and anxiety Works by blocking reuptake of serotonin into the presynaptic neuron causing serotonin to remain in synapse longer Makes serotonin fire more
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