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5 Written Questions

5 Matching Questions

  1. Absolute refractory period
  2. Local neurons
  3. Electrical gradient
  4. Polarization
  5. Myelinated axons
  1. a Electrical gradient across a membrane
  2. b Small neuron with no axon or a very short one
  3. c 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. d Axon covered with a myelin sheath
  5. e Difference in positive and negative charges across a membrane

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. Swelling of the soma, the point where the axon begins
  5. Brief period following an action potential, when the cell resists the production of further action potentials

5 True/False Questions

  1. HyperpolarizationIncreased polarization across a membrane


  2. MyelinInsulating material composed of fats and proteins


  3. Resting potentialRapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold


  4. Saltary conductionJumping of action potentials from one node to another by the flow of positive ions


  5. Concentration gradientDifference in positive and negative charges across a membrane


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