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Unformatted text preview: CHAPTER 3 - The Biological Bases of Behavior Communication in the Nervous System 0. Hardware: 0. Glia – structural support and insulation 1. Neurons – communication 2. Soma – cell body 3. Dendrites – receive 4. Axon – transmit away Neural Communication: Insulation and Information Transfer 1. Myelin sheath – speeds up transmission 2. Terminal Button – end of axon; secretes neurotransmitters 3. Neurotransmitters – chemical messengers 4. Synapse – point at which neurons interconnect The Neural Impulse: Electrochemical Beginnings 5. Hodgkin & Huxley (1952)- giant squid 5. Fluids inside and outside neuron 6. Electrically charged particles (ions) 7. Neuron at rest – negative charge on inside compared to outside 8.-70 millivolts – resting potential The Neural Impulse: The Action Potential 6. Stimulation causes cell membrane to open briefly 7. Positively charged sodium ions flow in 8. Shift in electrical charge travels along neuron 9. The Action Potential 10. All – or – none law The Synapse: Chemicals as Signal Couriers 11. Synaptic cleft 12. Presynaptic neuron 9. Synaptic vesicles 10. Neurotransmitters 13. Postsynaptic neuron 11. Receptor sites When a Neurotransmitter Binds: The Postsynaptic Potential 14. Voltage change at receptor site – postsynaptic potential (PSP)...
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This note was uploaded on 04/09/2008 for the course PSY 2020 taught by Professor Shpurik during the Spring '08 term at FIU.
- Spring '08