more neuron crap(exam4)
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what two forms does a nerve impulse have to take to travel from pt.A to pt.B?
- 1.excitability or irritability
what is excitability or irritability?
nerve impulse traceling along a single neuron->electrical event
what is conductivity?
nerve impulse traceling between adjacent neurons-> chemical event
what does excitability of a neuron depend upon?
what is plasma membrane composed of?
and is it a good or poor electrical conductor?
it is composed of phospholipids therefor a poor electrical conductor
the plasma membrane separates 2 good conductors, what are they and why are they good conductors?
- a.extracellular fluid and interacellular fluid are good conductors
- b. because they contain lots of "ions"
ions in the 2 solutions attempt to reach equilibrium as a result of what 2 forces?
- a)concentration forces
- b)electrical forces
what are concentration forces?
high concentration to low concentration
what is electrical forces?
opposite charges attract, & like charges repel
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