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List 8
The Cell
| Term | Definition |
|---|---|
| Fluid mosaic | flexible lipid bilayer with proteins embedded |
| Polar | phosphate head that faces the outside and inside of cell, freely interacting with water |
| Nonpolar | fatty acid tails, attached to phosphate head that remain facing the inside of the cell membrane, avoiding water in and out of the cell |
| Active transport | uses ATP energy to move molecules across the membrane |
| Passive transport | does not require energy to move molecules across the membrane. |
| Simple diffusion | small molecules like oxygen, water, and carbon dioxide can move thru the lipid bilayer from high to low concentration |
| Facilitated diffusion | molecules travel from high to low, through channel protein |
| Cell membrane | protects the cell and regulates what enters and leaves the cell. |