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A & P Lab #3
A & P Lab book exercise
Question | Answer |
---|---|
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 |