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Membrane Transport
| Question | Answer |
|---|---|
| What is a cell membrane made from? | Phospholipids, Cholesterol, Proteins, Glycoproteins and Glycolipids |
| What do the phospholipids produce? | A phospholipid Bilayer |
| What are the main ways of Membrane Transport? | Diffusion, Facilitated Diffusion, Osmosis, Active Transport, Exo and Endo cytosis |
| What concentration does diffusion go from? | High to Low |
| What molecules can use diffusion? | Hydrophobic or uncharged molecules |
| Is energy requiered for diffusion? | NO |
| What concentration does facilitated diffusion go from? | From high to low |
| When would diffusion and facilitated diffusion stop? | When en equlibrium is reached |
| What molecules can use facilitated diffusion? | Hydrophylic molecules or ions |
| How does facilitated diffusion happen? | Through either channel or carrier proteies. Channel proteins allow only a specific molecule or ion through. Carrier proteins change shape to allow the molecule through the membrane. |
| What are the proteins called when they can be open or closed? | Gated proteins |
| What is Osmosis? | The net movement of water molecules only. From a high to a low concentration |
| What proteins are involved in anctive transport? | Carrier Proteins |
| What is needed for active transport to happen? | Energy in the form of ATP |
| What is the concentration in Active Transport? | Against the concentration gradient from low to high |
| What is exocytosis? | The bulk movement of particles out of the cell |
| What is endocytosis? | The bulk movement of particle into the cell |
Created by:
stu036791
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