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5 Written questions

5 Matching questions

  1. Resting potential
  2. Graded potentials
  3. Saltary conduction
  4. Polarization
  5. Action potential
  1. a Electrical gradient across a membrane
  2. b Jumping of action potentials from one node to another by the flow of positive ions
  3. c Electrical potential across a membrane when a neuron is not being stimulated
  4. d Rapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold
  5. e Membrane potential that varies in magnitude and does not follow the all-or-none law

5 Multiple choice questions

  1. Difference in distribution of ions across a membrane
  2. Increased polarization across a membrane
  3. Axon covered with a myelin sheath
  4. Difference in positive and negative charges across a membrane
  5. 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

5 True/False questions

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

          

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

          

  3. Voltage-gated channelsMembrane channel whose permeability to sodium (or some other ion) depends on the voltage difference across the membrane

          

  4. 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

          

  5. Threshold of excitationIncreased polarization across a membrane

          

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