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15 Cards in this Set

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Interstitial fluid or extracellular fluid
Baths the exterior of the cell, rich in nutrients
Intracellular fluid
the nucleoplasm and cytosol
inside the plasma membrane
Passive transport
substances are transported across the membrane without energy input from the cell
Active transport
the cell provides metabolic energy ATP that drives the transport process
Osmosis
the diffusion of a solution through a membrane from a dilute solution into a more concentrated one
Kenetic Energy
(energy of motion)bouncing molecules move away from a region of more concentration to one of less concentration
Concentration Gradient
Moveing from area of more concentration to an area of less concentration
Simple Diffusion
the unassisted diffusion of solutes through the plasma membrane (or any selectivly permeable membrane)
Facillitated Diffusion
Provides passage for certian needed substances (glucose) that are lipid insoluableand to large to pass thru the membrane pores a protien membrane channel is used
Osmotic Pressure
the tendancy of a solution to hold water or pull into it,directly related to the concentration of solutesin the solution
Tonicity
the ability of a solution to change yhe size and shape of cells by altering the amount of water they contain
Isotonic Solutions
Have the same solute and water concentration that a cell has,(Lactated Ringer, 5% dextrose, 0.9% saline)
Hypertonic Solution
solution contains more solutes than are inside the cell, causes the cell to shrink or crenate, givrn to patients who have edema
Hypotonic Solution
the solution contains less solutes and more water than the cell, causing cells to plump up rapidly as water rushes into them. may cause cell to burst
Solute Pumping
Active transport reqires ATP to energize its protien carriers to move against concentration gradient (sodium-potasssium pump)