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9 Cards in this Set

  • Front
  • Back
electrical gradient
difference in electrical charge inside and outside of cell
resting potential
osmotic and electrostatic pressure. result of negatively charged proteins in cell
sodium-potassium pump
protein complex, repeatedly pumping 3 Na+ out of cell and 2 K+ in
temporal sumation
overlap of EPSPs and IPSPs in time
spatial summation
sumation of potentials of EPSP and IPSP across cell body and dendrites
saltatory conduction
the jumping of action potentials from one node of ranvier to the other
graded potentials
occur when a local neuron receives information from other neurons. membrane potentials that vary in magnitude without following the all-or-none law.
refractory period
absolute, about 1 ms after AP
relative, about 2-4ms after absolute
roel of glia and K+ in AP
glia absorbs K+ outflow from AP and transports K+ to walls of nearby arteries. K+ ions dilate artrery walls and increase flow of blood to that region.