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5 Written questions

5 Matching questions

  1. Electrical gradient
  2. Sodium-potassium pump
  3. Refractory period
  4. Axon hillock
  5. Resting potential
  1. a Difference in positive and negative charges across a membrane
  2. b Electrical potential across a membrane when a neuron is not being stimulated
  3. c Swelling of the soma, the point where the axon begins
  4. d Brief period following an action potential, when the cell resists the production of further action potentials
  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. Principle stating that the size, amplitude, and velocity of the action potential are independent of the intensity of the stimulus that initiated it
  2. 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
  3. Jumping of action potentials from one node to another by the flow of positive ions
  4. Transmission of an action potential down an axon
  5. Level of depolarization at which a brief stimulation triggers a rapid, massive electrical change by the membrane

5 True/False questions

  1. HyperpolarizationIncreased polarization across a membrane

          

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

          

  3. Myelinated axonsInsulating material composed of fats and proteins

          

  4. Local AnestheticDrug that attaches to the sodium channels of the membrane, preventing sodium ions from entering and thereby blocking action potentials

          

  5. PolarizationIncreased polarization across a membrane

          

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