335 study sheet test 1

335 study sheet test 1 - Behavioral Neuroendocrinology...

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Behavioral Neuroendocrinology Study Sheet Two major communication systems in the body Nervous system and the Endocrine system Nervous and Endocrine systems- Similarities Use chemicals to communicate Nervous system- neurotransmitters; endocrine system- hormones Both chemicals act via receptors or in target cells Nervous and Endocrine systems- Differences Neurotransmitters act over short distances- synapses vs. Hormones are secreted into bloodstream and carried to distant targets Neurotransmitters act instantaneously and for short duration vs. hormones act more slowly Have some voluntary control over neural signals vs. no control over hormone secretion How hormones affect behavior Estrogens- female sexual behavior Androgens- male sexual behavior Insulin- food intake Epinephrine- arousal and alertness Hormones act directly on the brain to alter behavior How behaviors affect hormones Mating stimulation- reflex ovulation Fear or surprise- epinephrine Smell of food- insulin secretion Shrews, cats, rabbits Experimental endocrinology A.A. Berthold in 1840- caponization of roosters Synapse Contacts between neurons Cytoplasm and organelles “Innards” of the soma Different types of synapses On smooth dendrite On dendritic spine On soma On terminal button from another cell
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Ions and ion channels Ions- electrically charged atoms Ion channels- how ions move in and out of cells Some neurotransmitters bind to receptor sites at the end of ion channels and cause them to open and close Action potential Generated by sequential opening and closing of ion channels, change electrical potential across cell membrane Axon hillock Integrates EPSP (excitory postsynaptic potential) and IPSP (inhibitory postsynaptic potentials) and decides to produce action potential How to turn off synaptic transmission Enzymatic destruction of neurotransmitter in synaptic cleft Reuptake of neurotransmitter by presynaptic neuron
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This note was uploaded on 09/30/2009 for the course PSYCH 335 taught by Professor Georgewade during the Fall '08 term at UMass (Amherst).

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335 study sheet test 1 - Behavioral Neuroendocrinology...

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