311Dsp08AnimalNerve - Exam #3 W 4/2 in class Review T 4/1...

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Exam #3 W 4/2 in class Review T 4/1 from 5-7pm in PAI 3.02 Before Exam #3: the nervous system, movement and the immune system
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Two ways to think about the world: atoms molecules organelles cells tissues organs systems organisms environment Reductionism
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Two ways to think about the world: atoms molecules organelles cells tissues organs systems organisms environment Reductionism Wholism
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Sensing and reacting to the environment is critical
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Failure to properly sense and react to the environment can be fatal
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CB 48.3 Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response.
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CB 48.5 Neurons: cells specialized for transmitting signals
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Axon Parts of a neuron Signals
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CB 48.7 In the brain neurons are shorter and highly interconnected
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CB 48.5 Neurons: signals move through neurons electrically and between neurons chemically
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Nervous System Signaling Stimulus Transduction Transduction Response
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Na + /K + pump plasma membrane Na + K + ATP–>ADP CB 48.10 Ionic gradients in neurons
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CB 48.13 At rest, the Na + /K + gradient is maintained
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CB 48.13 Depolarization occurs with the opening of Na + channels
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CB 48.13 An action potential starts when the local depolarization causes other Na + channels to open
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CB 48.12 Action potentials only occur when the initial depolarization is above the threshold
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CB 48.13 An action potential starts when the local depolarization causes other Na + channels to open
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CB 48.13 Repolarization is achieved via closing Na + and opening K + channels
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CB 48.13 the Na + /K + pump reestablishes the resting state
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This note was uploaded on 04/07/2008 for the course BIO 311D taught by Professor Reichler during the Spring '08 term at University of Texas at Austin.

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311Dsp08AnimalNerve - Exam #3 W 4/2 in class Review T 4/1...

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