| A | B |
|---|
| diffusion | the movement of a substance down its concentration gradient from a more concentrated area to a less concentrated area |
| endocytosis | the cellular uptake of materials in which the plasma membrane surrounds and engulfs extracellular materials |
| homeostasis | the tendency for an organism to maintain a relatively stable internal environment by regulating its metabolism and adjusting to its environment |
| transport proteins | special proteins that aid in the transport of charged particles through the membrane |
| osmosis | the movement of water (or another solvent) through a selectively permeable membrane from a solution with a lower concentration of solutes to one with a higher concentration of solutes |
| concentration gradient | the slope of concentration between two differently concentrated solutions |
| cell membrane | the membrane at the boundary of every cell, which serves as a selective barrier to the passage of ions and molecules |
| active transport | when molecules are actively moved, regardless of concentrations |
| exocytosis | moving to outside |
| selectively permeable | only certain substances may pass through |
| turgor | a cell's swelling against its cell wall b/c of content pressure |
| cytoplasm | the liquid within a cell |
| passive transport | molecules pass based on concentration |
| facilitated diffusion | the passage of ions passing down concentration gradients via proteins |
| glycoproteins | protein linked to a carbohydrate (usually glucose), acts as a receptor on cells |
