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Lecture 2

Lecture 2: Cell Membrane and Fluid Balance

QuestionAnswer
Plasma Membrane cell structure that allows cells to interact with the extracellular environment
Osmosis net diffusion of H2O through a membrance that is selectively permeable and follows the H2O gradient
Osmotic Pressure the force acting on the membrane as a consequence of increased water intake or the force required to prevent osmosis
Osmolarity total concentration of all solute particles in a solution
Hypertonic high concentration of an osmotically active solute, dehydrated cell
Hypotonic low concentration of an osmotically active solute, super hydrated cell
Osmotically Active Molecules solutes that cannot pass through the membrane and therefore promote H2O diffusion
Edema low concentration of plasma proteins result in a high concentration of extracellular fluids
Aquaporins protein channels that allow the diffusion of 3 billion H2O molecules per second
Fascilitated Diffusion diffusion of a non permeable solute through a membrane using a carrier protein following its concentration gradient (high concentration to low concentration)
Active Transport movement against the concentration gradient requiring ATP
Created by: rlmurp09
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