Psych 102, week 3 notes
Psych 102, week 3 notes Psych 102
Popular in Honors Introduction to Psychology
Popular in Psychology (PSYC)
This 4 page Class Notes was uploaded by Rebecca Goldman on Thursday September 15, 2016. The Class Notes belongs to Psych 102 at Towson University taught by Amy L. Bennet in Fall 2016. Since its upload, it has received 4 views. For similar materials see Honors Introduction to Psychology in Psychology (PSYC) at Towson University.
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Date Created: 09/15/16
II. Physiological Psychology role of brain in behavior A. Cells in the nervous system Glia cells in nervous system that support neurons ranging from cleaning mess and can produce inflammation if there is an injury. In addition, they can physically form to help support neurons B. Neurons (nerve cells) Internal structure is similar to other cells Primary function – communication Sends: Sensory Information Process Information processed by a group of neurons Myelin Controls Movements AlsoStructure of Neuron where info Synapses where neurons meet goes in and outmunication Dendrite Cel Axon Terminal le buttons Action potentials electrical impulses that convey the message down the axon of a neuron Neurotransmitters chemicals that are released from the terminal buttons and connect to receptors on the dendrites of another cell Neurotransmitters and receptors fit together like a key in a lock Neural communication Dendrites receive message Excitatory messages can cause action potentials (electrical current) Message sent down axon as electrical current (action potential) Produced by movement of Na and K across cell membrane Action potential is either all or none Neurotransmitters are released from terminals Neurotransmitters move across synapse Bind to receptors on dendrites Process begins again (or stops) Neurotransmitters and receptors fit like lock and key When neurotransmitter binds to receptor, it sends message to the next neuron Either excitatory (has action potential and does something) or inhibitory (sends when to stop) Cell decides Neurotransmitters are removed by reuptake by the presynaptic neuron a.k.a. it goes back into original neuron to be reused later C. Neurotransmitters Drugs work by enhancing (agonists) or interfering (antagonists) with specific neurotransmitters 1. Acetylcholine Functions: Movement and memory Disorders: Myasthenia gravis (too little) causes lack of ability to move/strength; Alzheimer’s (too little) Drugs (Agonists): Alzheimer’s treatments; nicotine; Botox; other poisons found in plants and animals 2. Dopamine Functions: Movement and reward Disorders: Parkinson’s; schizophrenia Drugs: Cocaine; amphetamines; 1 dopa; antipsychotics 3. Norepinephrine Functions: Mood, alertness, and stress response Disorders: Depression Drugs: Some antidepressants; major stimulants; betablockers 4. Serotonin Functions: Mood and appetite Disorders: Depression Drugs: Antidepressants; hallucinogens 5. GABA Functions: Inhibition and movement Disorders: Huntington’s Drugs: Alcohol; sedatives 6. Glutamate Functions: Excitation; memory Disorders: Schizophrenia Drugs: PCP; ketamine 7. Endorphins Functions: Pain regulation, some placebo effects, and “runner’s high” Disorders: N/A Drugs: Prescription pain killers Review Questions Which neurotransmitter is lost in Alzheimer’s disease? Acetylcholine Which neurotransmitter is part of the reward system? Dopamine Which neurotransmitter is increased by Prozac? Which neurotransmitter causes a “runner’s high”?
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