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5 Written questions

5 Matching questions

  1. Hyperpolarization
  2. Refractory period
  3. Local neurons
  4. Voltage-gated channels
  5. Saltary conduction
  1. a Jumping of action potentials from one node to another by the flow of positive ions
  2. b Increased polarization across a membrane
  3. c Brief period following an action potential, when the cell resists the production of further action potentials
  4. d Membrane channel whose permeability to sodium (or some other ion) depends on the voltage difference across the membrane
  5. e Small neuron with no axon or a very short one

5 Multiple choice questions

  1. Axon covered with a myelin sheath
  2. Difference in distribution of ions across a membrane
  3. Insulating material composed of fats and proteins
  4. Level of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane
  5. Electrical gradient across a membrane

5 True/False questions

  1. Propagation of the action potentialTransmission of an action potential down an axon


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


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


  4. Local AnestheticSmall neuron with no axon or a very short one


  5. Relative 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