41-42-nervsysoutl

41-42-nervsysoutl - Biology 3 Lecture Nervous System(SBM Ch...

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© 2011 copyright Marta D. de Jesus I. Organization A. Earliest nervous systems 1. diffuse nerve nets 2. nerves 3. ladder-type system 5. multiple sets of ganglia 6. in organisms like us a. b. 1) 2) (i) (ii) B. 4 functions 1. reception 2. transmission 3. integration 4. transmission II. Cells A. support cells 1. microglia 2. astrocytes 3. oligodendrocytes 4. ependymal cells 5. Schwann cells B. neurons 1. cell body 2. dendrites 3. axon a. Node of Ranvier b. axon collaterals c. synaptic terminals 4. kinds of neurons 3 different functions
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C. organization 1. circuits 2. nerves III. signaling A. resting potential 1. maintained by 2. additional help by 2. polarized B. strong signal: action potential 1. start at 2. depolarization 3. at –55 mV 4. repolarization 5. reset 6. propagation C. saltatory conduction D. “all or none” law E. to another cell 1. electrical synapses 2. chemical synapses
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This note was uploaded on 01/17/2012 for the course BIOL V04 taught by Professor De-jesus,m during the Fall '08 term at Ventura College.

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41-42-nervsysoutl - Biology 3 Lecture Nervous System(SBM Ch...

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