12 terms

Cells, Diffusion, and Osmosis Vocabulary

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hydrogen bond
weak chemical bond formed by the attraction of positively charged hydrogen atoms to negatively charged atoms
dynamic equilibrium
result of diffusion where there is continuous movement of particles but no overall change in concentration
osmosis
movement of water from an area of greater concentration of water to an area of lesser concentration of water
passive transport
movement or transport of substances across a cell membrane from an area of high concentration to an area of low concentration requiring the cell to use no energy
hypotonic solution
solution in which the concentration of solute outside the cell is lower than the concentration of solute inside the cell
endocytosis
process in which materials are engulfed with a portion of the cell membrane into the cell through the use of energy
isotonic solution
solution in which the concentration of solute outside the cell is the same as the concentration of solute inside the cell
exocytosis
process by which materials are expelled by the cell through the use of energy
hypertonic solution
solution in which the concentration of solute particles outside the cell is higher than the concentration of those particles inside the cell
active transport
movement or transport of substances across the cell membrane from an area of low concentration to an area of high concentration requiring the cell to use energy
transport proteins
structures that span the cell membrane creating a selectively permeable membrane that regulates which molecules enter and leave the cell
diffusion
net, random movement of particles from an area of high concentration to an area of low concentration resulting in even distribution