ap lab 4/3/12

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sjmjr
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145377
Filename:
ap lab 4/3/12
Updated:
2012-04-02 22:28:39
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ap lab 12
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ap lab 4/3/12
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  1. what causes ions to mave across the cell membrane
    gradients
  2. what do gradients therefor result in
    electrical potential
  3. what is the electrical potential across a membrane called
    membrane potential
  4. where is sodium more highly concentrated
    outside the cell
  5. where is potassium more highly concentrated
    inside the cell
  6. where is chlorine more highly concentrated
    outside the cell
  7. what do ions cross cell membranes through
    ion channels
  8. what is the term that refers to cell having channels of a particular ion
    permeable
  9. what is the term for cells bewing permeable to certain ions but not others
    selectivly permeable
  10. what causes ions to move
    gradients
  11. in the space below decribe the movement of an ion that is diffusing down its cocentration gradient
    move from an area where its concentration is high to an area where it is low
  12. do K+ ions diffuse into or out of a cell
    out of cell
  13. what is the electrical potential across a cell membrane called
    membrane potential
  14. what is membrane potential measured in
    millivolts
  15. does Na+ diffuse into or out of a cell
    into
  16. what is the membrane potential of neurons at rest called
    resting membrane potential
  17. resting membrane potential depends on what two ions
    Na+ and K+
  18. what is the value of the resting membrane potential for many neurons
    -70 mV
  19. what direction does K+ leak
    out of neuron
  20. what direction does Na+ leak
    into neuron
  21. as the leaking of Na+ and K+ continues the membrane potential moves toward what value
    0
  22. in what direction is K+ transported to keep its gradient from running down
    into cell
  23. in what direction is Na+ transported to keep its gradient from running down
    out of cell
  24. what maintains the resting membrane potential
    the Na+ - K+ pump
  25. what provides the energy for the Na + K+ pump
    ATP
  26. are Na+ and K+ pumped alon or agianst thier respective gradients
    against

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