Bio lab

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Author:
kbalanon
ID:
176124
Filename:
Bio lab
Updated:
2012-10-07 20:09:05
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exchange cells envio
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week 5
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  1. concentration gradient
     the gradual difference in the concentration of solutes in a solution between two regions.
  2. osmosis
    Diffusion of a solvent (usually water molecules) through a semipermeable membrane from an area of lowsolute concentration to an area of high solute concentration.
  3. Diffusion
    The passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration.
  4. Hypertonic
    A cell placed in a highly concentrated solution will result in the water molecules diffusing out of the cell. Eventually, the cell will shrink. 
  5. Hypotonic
    A cell placed in a low concentrated solution will result in the water molecules diffusing in of the cell. Eventually, the cell will enlarge.
  6. Isotonic
    Pertaining to a solution that has the same tonicity as some other solution with which it is compared. For example, blood serum is isotonic to a physiologic salt solution. Solutions that have same tonicity will result in no net flow of water across the cell membrane.
  7. Hemeolysis
    • The lysis or the breaking open of red blood cell (erythrocyte) causing the release of hemoglobin into the surrounding fluid.
    • hemo-, meaning blood + -lysis, meaning to break open
    • Hypotonic
  8. Creneation
    Crenation - cell shrinks by osmosis because H2O leaves cell. solution is HYPERtonic
  9. Red blood cells
  10. Turgor pressure
    • The pressure exerted by water inside the cell against the cell wall

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