Chapter 6 (Drugs & Behavior) and Chapter 7 (Learning) - November 05 2009

Chapter 6 (Drugs & Behavior) and Chapter 7 (Learning) - November 05 2009

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Chapter 6 (Drugs and Behavior) & Chapter 7 (Learning theory) November 5 2009 Review questions: Q1: Which of the following statements is/are false regarding comas? A: A coma is really just a deep sleep . Q2: The theory that explain hypnosis in terms of role s and expectation is the A: Social cognitive theory ______________________________________________________________________ Chapter 6 : Drugs, the brain, & behavior Drugs and The brain Drug-enter bloodstream and into the brain through a network of small vessels (called capillaries) Blood-brain barrier-screen out many foreign substances Many drug pass though and either facilitate Agonist - is a drug that increases the activity of a neurotransmitter Enhance neuron’s ability to synthesize, store, or release the neurotransmitter Bind with and stimulate post-synaptic receptor site Inhibit reuptake Example of an agonist: amphetamines Antagonist – is a drug that decrease or inhibits the action of a neurotransmitter Interferes with the neuron’s ability to synthesize, store, or release the neurotransmitter Block (but do not activate the post-synaptic receptor sites) Interfere with neuron’s ability to synthesize, store, or release the neurotransmitter
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Example of antagonist: clozapine (used to treat schizophrenia) block dopamine at the receptor sites Depressants - decrease NS functioning Alcohol Increase activity of GABA (inhibitory neurotransmitter) Decreases glutamate (Excitatory neurotransmitter) Low to moderate doses Reduces tension and anxiety Less inhibition Euphoria Impaired physical/psychological functioning Thinking /judgment High doses Disorientation Depression Unconsciousness Slow down vital life processes (even to point of death) Chronic/long tern use Tolerance development gradually Physiological dependence Liver damage Relationship difficulties Sexual difficulties Alcohol abuse A leading cause of health problems
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2/3 of adults drink Short term risks : accidents, assaults Long term risks : alcoholism, cirrhosis, breast and other cancers, heart disease, brain atrophy Higher risk of suicide Life expectancy 10-12 years less
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