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Movement
Movement through Membranes
Term | Definition |
---|---|
Diffusion | The passive movement of molecules from areas of high concentration to area of low concentration. |
Concentration Gradient | The difference in concentration between two areas |
Osmosis | The movement of water from an area of high water concentration to an area of low water concentration across a selectively permeable membrane. |
selectively-Permeable Membrane | Proteins on cell membranes select or regulate what kind of molecules can move in and out of cells. |
Multicellular Organisms | Need to monitor the environment of their bodies for salt and water. |
Osmoregulation | Ways that organisms have of keeping the concentration of a solution at an optimum |
Turgor | The firm state of plant cell due to the outward pressure of the cytoplasm against the cell wall, caused by entering the cell by osmosis. |
Active Transport | The process where chemicals are taken into a cell against the diffusion gradient |