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5 Written Questions

5 Matching Questions

  1. Local neurons
  2. Sodium-potassium pump
  3. Axon hillock
  4. Myelinated axons
  5. Selectively Permeable
  1. a Small neuron with no axon or a very short one
  2. b Ability of certain chemicals to pass more freely than others through a membrane
  3. c Mechanism that actively transports three sodium ions out of the cell while simultaneously drawing in two potassium ions
  4. d Axon covered with a myelin sheath
  5. e Swelling of the soma, the point where the axon begins

5 Multiple Choice Questions

  1. Transmission of an action potential down an axon
  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. Brief period following an action potential, when the cell resists the production of further action potentials
  4. Drug that attaches to the sodium channels of the membrane, preventing sodium ions from entering and thereby blocking action potentials
  5. Level of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane

5 True/False Questions

  1. Action potentialElectrical potential across a membrane when a neuron is not being stimulated

          

  2. Relative refractory periodTime 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

          

  3. Resting potentialElectrical potential across a membrane when a neuron is not being stimulated

          

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

          

  5. Concentration gradientDifference in distribution of ions across a membrane

          

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