Cell Physiology

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Author:
feete
ID:
228432
Filename:
Cell Physiology
Updated:
2013-07-28 15:33:22
Tags:
bio
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Description:
Biology
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  1. Active transport
    • movement of molecules against the concentration gradient. moving from low to high concentration.
    • *needs energy (ATP)*
  2. Passive transport
    no energy required
  3. Intracellular fluid
    fluid in the cell
  4. extracellular fluid
    fluid outside of the cell
  5. Interstitial fluid
    fluid within tissues
  6. semi permeable membrane
    • somethings can get in and out of the cell.
    • *** All mammal cells are semi-permeable ***
  7. Impermeable membrane
    nothing can get into and out of the cell
  8. freely permeable
    • anthing and everything can get in and out of the cell.
    • *** Truly doesnt exist ***
  9. Diffusion (passive)
    • movement of molecules moving from a higher concentration to a lower concentration.
    • EX- making ice-tea, the powder is the solute and the water is solvent.
  10. Facilated diffusion (passive)
    • molecules that can diffuse through the cell but not quickly and requires a carrier protein to assist.
    • *still moves from a high to low concentration*
  11. Osmosis (passive)
    • the solvent moves instead of the solute, passive movement of water through a semi-permeable membrane from a dilute solution to a more concentrated one
    • * want to have equal concentrations in and out of the cell*
  12. Isotonic solution
    have equal concentrations of solute both in and outside of the cell.
  13. Hypertonic solution
    • the cell will strink because the concentration of solutes are higher outside of the cell.
    • * crenation- cell strinks*
  14. Hypotonic solution
    • the cell will swell because the concentration of solute is higher inside the cell.
    • * the cell can lyse (explode)*
  15. Endocytosis (two types)
    phagocytosis- "cell eating" eating whole molecules

    Pinocytosis- " cell drinking" ingestion of liquid particles
  16. exocytosis
    • moving particles outside of the cell
    • * excretion of waste products*
    • *mast cells- secrete histamine
  17. Sodium-Potassium pump
    • low concentration of sodium inside the┬ácell.
    • high concentration of potassium inside the cell.
    • three sodium ions are exchanged for every two potassium.
    • requires energy.

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