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5 Written questions

5 Matching questions

  1. Relative refractory period
  2. Hyperpolarization
  3. Local Anesthetic
  4. Resting potential
  5. Voltage-gated channels
  1. a Electrical potential across a membrane when a neuron is not being stimulated
  2. b Increased polarization across a membrane
  3. c Drug that attaches to the sodium channels of the membrane, preventing sodium ions from entering and thereby blocking action potentials
  4. d 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
  5. e Membrane channel whose permeability to sodium (or some other ion) depends on the voltage difference across the membrane

5 Multiple choice questions

  1. Small neuron with no axon or a very short one
  2. Electrical gradient across a membrane
  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. Level of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane
  5. Jumping of action potentials from one node to another by the flow of positive ions

5 True/False questions

  1. Sodium-potassium pumpRapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold

          

  2. Selectively PermeableDifference in positive and negative charges across a membrane

          

  3. Electrical gradientDifference in distribution of ions across a membrane

          

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

          

  5. Graded potentialsMembrane potential that varies in magnitude and does not follow the all-or-none law

          

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