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5 Written questions

5 Matching questions

  1. Action potential
  2. Local neurons
  3. Polarization
  4. Voltage-gated channels
  5. Electrical gradient
  1. a Electrical gradient across a membrane
  2. b Small neuron with no axon or a very short one
  3. c Rapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold
  4. d Membrane channel whose permeability to sodium (or some other ion) depends on the voltage difference across the membrane
  5. e Difference in positive and negative charges across a membrane

5 Multiple choice questions

  1. Membrane potential that varies in magnitude and does not follow the all-or-none law
  2. Time after the absolute refractory period, when potassium gates remain open wider than usual, requiring a stronger than usual stimulus to initiate an action potential
  3. Level of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane
  4. Transmission of an action potential down an axon
  5. Increased polarization across a membrane

5 True/False questions

  1. Axon hillockSwelling of the soma, the point where the axon begins

          

  2. Absolute refractory periodTime after the absolute refractory period, when potassium gates remain open wider than usual, requiring a stronger than usual stimulus to initiate an action potential

          

  3. Saltary conductionElectrical gradient across a membrane

          

  4. Resting potentialElectrical potential across a membrane when a neuron is not being stimulated

          

  5. Sodium-potassium pumpMechanism that actively transports three sodium ions out of the cell while simultaneously drawing in two potassium ions

          

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