| A | B |
|---|
| homeostasis | keeping everything in balance inside a cell or an organism |
| active transport | transport which requires energy; example Na/K pump |
| passive transport | transport in which no energy is required; example diffusion, osmosis |
| diffusion | the movement of a substance from an area of high concentration to an area of low concentration; no energy is required; |
| osmosis | movement of water from an area of high concentration to an area of low concentration; no energy is required |
| hypotonic | dilute |
| hypertonic | concentrated |
| isotonic | concentration is the same inside and out of the cell |
| phagocytosis | process by which a portion of the cell membrane engulfs and takes in a small particle of solid material |
| pinocytosis | process by which a portion of the cell membrane engults and takes in a small droplet of liquid |
| exocytosis | processes by which substances are expelled through the membrane in vacuoles |
| polar | molecule with positive and negative sides; example water |
| phospholipid | type of molecule which makes up the cell membrane |
| ATP | energy molecule the cell uses in active transport processes |
| marker protein | protein in the cell membrane which gives the cell identity (mine, yours, type of cell) |
| channel protein | type of protein in the cell membrane which lets large substances pass through the cell membrane |
| receptor protein | protein in the cell membrane which senses the environment outside the cell |
| non-polar | molecule with out positive and negative charges on the molecule; example carbon dioxide |
