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cell membrane
| Term | Definition |
|---|---|
| cell membrane | the outer boundary of the cell, controls what comes in and out, and double layer of phospholipids and proteins |
| phospholipids bilayer | structure of the cell membrane , two layers of phospholipids , heads are hydrophilic and tails are hydrophobic |
| proteins | embedded in phospholipid bilayer , proteins help transport substances in and out of the cell, act like receptors, provide structure |
| carbohydrates | attached to proteins or lipids on the outer surface of the cell membrane , aid in recognition and communication |
| selectively permeable | ability of the membrane to allow some substances pass through while blocking others |
| fluid mosaic model | accepted model of the cell membrane , lipids and proteins move fluidly within the layer creating mosaic components |
| cholesterol | a lipid found in the cell membrane that maintain membrane fluidity and stability |
| passive transport | movement of molecules from high to low concentration without using energy |
| diffusion | movement of molecules from an area of high to low concentration |
| osmosis | movement of water across a membrane |
| facilitated diffusion | the movement of molecules via a protein channel |
| active transport | movement of molecules from low to high concentration which requires energy ( ATP) |
| sodium potassium pump | a specific active transport process that sodium ions out and potassium ions into the cell |
| hypotonic | solution with a lower concentration of solutes, water moves into the cell |
| hypertonic | solution with a higher concentration of solutes water moves out of the cell |
| isotonic | solution with same concentration of solutes water moves in and out of the cells |
| equilibrium | when the concentration of molecules is the same on both sides of the membrane |
Created by:
mgraven7728
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