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5 Written questions

5 Matching questions

  1. Myelin
  2. Propagation of the action potential
  3. Action potential
  4. Local neurons
  5. Refractory period
  1. a Brief period following an action potential, when the cell resists the production of further action potentials
  2. b Transmission of an action potential down an axon
  3. c Small neuron with no axon or a very short one
  4. d Rapid depolarization and slight reversal of the usual polarization caused by stimulation beyond the threshold
  5. e Insulating material composed of fats and proteins

5 Multiple choice questions

  1. Electrical gradient across a membrane
  2. Principle stating that the size, amplitude, and velocity of the action potential are independent of the intensity of the stimulus that initiated it
  3. Mechanism that actively transports three sodium ions out of the cell while simultaneously drawing in two potassium ions
  4. Difference in distribution of ions across a membrane
  5. Difference in positive and negative charges across a membrane

5 True/False questions

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

          

  2. HyperpolarizationIncreased polarization across a membrane

          

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

          

  4. Myelinated axonsAxon covered with a myelin sheath

          

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