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1101 chapter 2 post

1101 chapter 2 post - Chapter Two The Biology of Behavior...

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Chapter Two The Biology of Behavior
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True or False? We only use 10% of our brains.- false Women are more “right brained” whereas men are more “left brained.”- false Marijuana kills brain cells.- false
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Where is the “Seat” of the Mind? Cardiac Hypothesis - Empedocles, Aristotle, Religions (?) E Brain Hypothesis - Alcmaeon - Hippocrates - Galen Gladiators
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Brain Cells The __Neuron _ Hypothesis - Holds that the neuron is the functional unit of the brain, and therefore of mental events Neurons: 100 ___billion ___ Glia: 1 ___trillion - Myelin- enable cells to communicate more efficiently and speedily - Other Support Roles
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Key Parts of the Neuron Dendrites - ___receive ______ signals from other neurons Cell Body (_____soma ____) _ - DNA _____axon terminal (terminal button)____ - Sends signal toward other neurons
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Key Parts of the Neuron Axon ________________________ - Where the action potential is created Myelinated Segments (Myelin) - _____speed_______ __up___ Action Potentials ____Nodes____ of Ranvier - Reinstates the full _____________________ of the action potential so that it doesn’t grow weaker as it travels down the axon
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Key Parts of the Neuron Axon ______terminal__________ - Releasing the neurotransmitter into the synapse in order to affect the next neuron in line - Synapse- space
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A Neuron Is ____________________ . Based on Ionic Charges (Think: Battery) B - The Positive Excitatory input into a neuron involves allowing ______ charged ions like sodium (Na+) into the cell. Makes cell _____________ likely to “fire” E.G. Nicotine - The Negative Inhibitory input into a neuron involves allowing ____ charged ions like chloride (Cl-) into the cell. Makes cell _____________ likely to fire
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