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A & P Lab #3

A & P Lab book exercise

QuestionAnswer
selectively permeable plasma membrane regulates the passage of small molecules through the membrane
passive transport diffusion and osmosis are examples and this process requires no ATP
phospholipid bilayer a double layer of phospholipid molecules plus several other components such as cholesterol and glycolipid
hydrophilic water loving
hydrophobic water fearing
integral proteins proteins containing membrane channelsthat regulate the passage of specific ions through the membrane
active transport movement of molecules that require ATP to pass through the membrane
Brownian movement the motion that causes molecules to bump into adjacent molecules
kinetic energy the energy supplied by Brownian movement
diffusion the net movement of substances from a region of greater concentration to a region of lower concentration
concentration gradient this exists if there is aregion with a higher concentration of a substance and an area with a lower concentration gradient
equilibrium equal distibution occurs
osmosis the net movement of water through a selectively permeable membrane
osmotic pressure created by more solute in the solvent
reverse osmosis process in which the pressure applied to arm B is greater than the osmotic pressure
isotoic solution a solution that has the same solute concentrations as a cell
hypertonic solution a solution containing more solute than a cell
hypotonic solution a solution containing less solute than a cell
crenate when a cell will shrink when there is a hypertonic solution present
lyse when a cell will burst due to the presence of an hypotonic solution
hemolysis the process of a blood cell rupturing in hypotonic solution
tonicity the effect of solutions on cells
endocytosis the active transport of materials into the cell
phagocytosis the movement of large particles into the cell
pinocytosis the movement of small molecules and fluid into the cell
exocytosis the active transport of materials out of the cell
Created by: kshaye17