the nervous system

By mmander719, Apr 2012

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be able to describe the three phases of the action potential phase.	rising phase: rapid openings of Na+ channels Falling phase:opening of K+ channels leads to diffusion of K+ out of cell undershoot phase:this happens because the K+ phase is open a little too long
describe saltatory conduction:	it speeds up the process of impulse transmissiong by being able to skip or jump of certain parts of the axon. example the peopel in a stadium doing the wave sections missing it travels faster around the stadium
define eletrrical synapses and they are rare in what type of nervous system?	direct cytoplasmic connections formed by gap junctions between pre and postsynaptic neurons. pass directly from one cell to another. Rare in vertebrates
synaptic vesicles:	the swollen end of an axon which is packed full of neurtransmitters which allows this action to take place too many neutransmitters wont allow a new synapse to take place
describe what synaptic integration is.	its the process of small EPSP's added together bringing the membrane closer to the potential threshold, while the IPSP's subtract from the depolarizing effect deterring the membrane potential from reaching threshold

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