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15 Cards in this Set
- Front
- Back
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The Fluid Mosaic Model |
- Model of plasma membrane movement - molecules move slightly but not "too" much- Eg. like a door on hinges - Cholesterol acts as the hinge for the membrane- The FMM is known as a "fluidity buffer": Resisting changes in fluidity caused by temp |
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Protein Channel |
- Embedded in the membrane - covers the entire membrane - Assists in the transport of large molecules into & out of the cell when they pass by other means - This is through Active Transport or Facilitated Diffusion |
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Cholesterol |
- Has a rigid structure in a ring-shape - Helps to support and strengthen the structure - keeps the structure fluid by generating extra space between lipids allowing them to move freely. |
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Globular Protein |
- Spherical and somewhat water soluble - can act as enzymes, messengers, Cellular recognition, transport of molecules, signal transduction and intercellular joining |
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Glycolipid |
- Have a shortcarbohydrate chain covalently attached and exposed on the outside of the cell - Function as communicators, often acting as markers for cellular recognition |
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Glycoprotein |
- Proteins with a short carbohydrate chain covalently attached - Used for cellular recognition but also play a role in the structural integrity of the cell. |
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Peripheral Protein |
- Not embedded in the bilayer but are loosely bound to the membrane surface - Can act as enzymes, messengers, Cellular recognition, transport of molecules, signal transduction and intercellular joining. |
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Integral Protein |
- Penetrate the lipid bilayer - can act as enzymes, messengers, Cellular recognition, transport of molecules, signal transduction and intercellular joining |
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Filaments of Cytoskeleton |
- Several different types - Eg Actin filaments - role in movement - Eg. Intermediate - Designed to bear tension - Eg. Microfilaments - transport of vesicles |
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Surface Protein |
- Any protein embedded in or spanning a layer of cell membrane - can act as enzymes, messengers, Cellular recognition, transport of molecules, signal transduction and intercellular joining |
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Alpha-Helix Protein |
- the shape a proteins makes when it passes through the lipid bilayer. - Transmembrane proteins can pass through once (single-pass proteins) or multiple times (multi-pass proteinsl - The only proteins that can perform functions both inside and outside of the cell. |
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Phospholipid Molecule |
- Make up the lipid bilayer - Each contains a hydrophobic tail region and a hydrophillic head region - Forms the wall between inside and outside the cell |
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Hydrophobic tails |
"Water-fearing" |
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Hydrophillic heads |
"loves water" |
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Carbohydrate |
- on outside surface of the cell - bound to proteins (Glycoproteins) or lipids (Glycolipids) - Act as distinctive cell markers allowing cells to recognise each other - Eg. Allowing immune cells to differentiate what it should and shouldn't attack |
