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5 Written questions

5 Matching questions

  1. Propagation of the action potential
  2. Polarization
  3. Graded potentials
  4. Hyperpolarization
  5. Saltary conduction
  1. a Increased polarization across a membrane
  2. b Electrical gradient across a membrane
  3. c Membrane potential that varies in magnitude and does not follow the all-or-none law
  4. d Transmission of an action potential down an axon
  5. e Jumping of action potentials from one node to another by the flow of positive ions

5 Multiple choice questions

  1. Ability of certain chemicals to pass more freely than others through a membrane
  2. Mechanism that actively transports three sodium ions out of the cell while simultaneously drawing in two potassium ions
  3. 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
  4. Brief period following an action potential, when the cell resists the production of further action potentials
  5. Difference in distribution of ions across a membrane

5 True/False questions

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


  2. Threshold of excitationLevel of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane


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


  4. All-or-none lawRapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold


  5. Myelinated axonsAxon covered with a myelin sheath