psych notes sept 17 2009 nervouse system continued

psych notes sept 17 2009 nervouse system continued - Notes...

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Notes 9/17/2009 Neurotransmitter Function - a chemical released by one cell that binds to the receptors on another cell Type of signal carried - a chemical message telling the next cell to fire or not to fire its own actions potential. Vesicles are located at the end of axon terminals, they bind to the end of the axon and release chemicals into the synapse. Each neurotransmitter is shaped to fit into a certain receptor Neurotransmitters are stored in vesicles, which release the neurotransmitters into the synapse Enzymes in the synapse either destroy the neurotransmitters afterwards or let them be taken back in Types of Neurotransmitters Acetylcholine (cholinergic) -Synthesized by choline acetyltransferase -Removed bt the enzyme: acetylcholinesterase -In the brain: associated with memory and Alzheimer’s disease (hippocampus) -Periphery: associated with slowing of the heart, muscle movements( at every neuromuscular junction) -Nicotine binds with receptors, botulin toxin blocks Ach release, scopolamine blocks receptors. Norepinephrine (catecholamine) -Noradrenaline- contributes to arousal -released from noradrenergic neurons -fight-or-light response- preparation for action -Mostly found in the locus coeruleus in hindbrain -waking and sleeping, learning, and regulation of mood Serotonin (catecholamine) or 5-HT -Most cells are near hindbrain -Serotonergic -project to hypothalamus, hippocampus, and cortex -Affects sleep and mood(depression), possibly obesity and aggression, bipolar disorder, sexualtily. -Synthesized from Tryptophan(an amino acid obtained from diet)
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This note was uploaded on 02/07/2011 for the course PSYCH 0010 taught by Professor Tokowitz during the Spring '09 term at Pittsburgh.

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psych notes sept 17 2009 nervouse system continued - Notes...

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