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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 |