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5 Written questions

5 Matching questions

  1. Polarization
  2. Myelinated axons
  3. Sodium-potassium pump
  4. Selectively Permeable
  5. Graded potentials
  1. a Electrical gradient across a membrane
  2. b Axon covered with a myelin sheath
  3. c Ability of certain chemicals to pass more freely than others through a membrane
  4. d Membrane potential that varies in magnitude and does not follow the all-or-none law
  5. e Mechanism that actively transports three sodium ions out of the cell while simultaneously drawing in two potassium ions

5 Multiple choice questions

  1. Insulating material composed of fats and proteins
  2. Transmission of an action potential down an axon
  3. Principle stating that the size, amplitude, and velocity of the action potential are independent of the intensity of the stimulus that initiated it
  4. Jumping of action potentials from one node to another by the flow of positive ions
  5. Electrical potential across a membrane when a neuron is not being stimulated

5 True/False questions

  1. Electrical gradientDifference in distribution of ions across a membrane


  2. Concentration gradientDifference in distribution of ions across a membrane


  3. HyperpolarizationIncreased polarization across a membrane


  4. Threshold of excitationIncreased polarization across a membrane


  5. Absolute 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