| A | B |
| active transport | requires energy |
| passive transport | does not require energy |
| osmosis | movement of water from high to low amounts |
| diffusion | movement of molecules from high to low |
| endocytosis | movement of particles into a cell |
| exocytosis | when particles leave a cell |
| phagocystosis | movement of large, solid particles into a cell |
| pinocytosis | movement of smaller, liquid particles into a cell |
| solute | the substance being dissolved |
| solvent | the substance doing the dissolving |
| equilibrium | when the amount of particles on either side of a membrane are in equal amounts |
| isotonic solution | solution in which the solute and solvent are in equilibrium |
| hypotonic solution | type of solution in which a cell would gain water, expand and possibly explode |
| hypertonic solution | solution in which a cell loses water and shrinks |
| selective permeability | condition in which a cell chooses what it wants to let into the cell |
| lipid bilayer | describes the plasma membrane as two layers of fats |
| cell | basic unit of structure and function of living things |
| photosynthesis | produces oxygen and glucose |
| cellular respiration | produces ATP (energy) |
| biology | the study of life |