5 Nervous System 4 Synapses and Neurotransmitters, Postsynaptic Potentials and Integration

5 Nervous System 4 Synapses and Neurotransmitters, Postsynaptic Potentials and Integration

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The Nervous System I. Overview of the nervous system II. Components of the nervous system A. Neurons B. Glial Cells III. Membrane Potentials V. Signaling via membrane potential changes A. Graded potentials B. Action potentials VI. Synapses and Neurotransmitters VII. Postsynaptic Potentials and Integration
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How do neurons communicate? Dendrites Stimulus cleus Cell body Axon hillock Presynaptic cell Axon Synaptic terminals Synapse Postsynaptic cell urotransmitter Between neurons: • Electrical synapses Chemical synapses Within a neuron: dendrites to cell body (electrical) • cell body to axon terminals (electrical) {
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The Chemical Synapse Fig. 48.15 Voltage-gated Ca 2+ channel Ca 2+ 1 2 3 4 Synaptic cleft Ligand-gated ion channels Postsynaptic membrane Presynaptic membrane Synaptic vesicles containing neurotransmitter 5 6 K + Na + Action potential propagation
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Neurotransmitters: Chemical Signals of the Nervous System • most are either amino acids, modified amino acids or peptides
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5 Nervous System 4 Synapses and Neurotransmitters, Postsynaptic Potentials and Integration

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