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5 Written questions

5 Matching questions

  1. Polarization
  2. Resting potential
  3. Sodium-potassium pump
  4. Hyperpolarization
  5. All-or-none law
  1. a Mechanism that actively transports three sodium ions out of the cell while simultaneously drawing in two potassium ions
  2. b Increased polarization across a membrane
  3. c Electrical potential across a membrane when a neuron is not being stimulated
  4. d Electrical gradient across a membrane
  5. e Principle stating that the size, amplitude, and velocity of the action potential are independent of the intensity of the stimulus that initiated it

5 Multiple choice questions

  1. Insulating material composed of fats and proteins
  2. Brief period following an action potential, when the cell resists the production of further action potentials
  3. Time immediately after an action potential, when the sodium gates close and the membrane cannot produce an action potential in response to stimulation of any intensity
  4. Difference in distribution of ions across a membrane
  5. Level of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane

5 True/False questions

  1. Local neuronsSmall neuron with no axon or a very short one

          

  2. Propagation of the action potentialRapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold

          

  3. Graded potentialsRapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold

          

  4. Local AnestheticDrug that attaches to the sodium channels of the membrane, preventing sodium ions from entering and thereby blocking action potentials

          

  5. Axon hillockElectrical gradient across a membrane

          

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