Wednesday, May 12, 2010

GIVE THE ROLE OF OSMOTIC PRESSURE AND OSMOSIS IN CONTROLLING THE MOVEMENT OF WATER ACROSS THE CELL MEMBRANE?

OSMOSIS IS THE MOVEMENT OF WATER MOLECULES ACROSS THE CELL MEMBRANE. IF THE OSMOTIC PRESSURE IS HIGH i.e THERE ARE MORE WATER MOLECULES INSIDE THE CELL THEN WATER MOVES OUT TO LESSEN THE PRESSURE. IF THE OSMOTIC PRESSURE IS VERY LOW THEN WATER MOLECULES MOVE INTO THE CELL TO KEEP THE PRESSURE OUTSIDE AND INSIDE EQUAL.





(IT IS RUDE TO WRITE IN ALL CAPITALS)GIVE THE ROLE OF OSMOTIC PRESSURE AND OSMOSIS IN CONTROLLING THE MOVEMENT OF WATER ACROSS THE CELL MEMBRANE?
osmosis is when water crosses over a cell membrane because there are less water molecules on the other side than the side it starts on
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