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10 Cards in this Set
- Front
- Back
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Osmosis |
- Passive Transport
- The movement of water molecules across a semi-permiable membrane - High concentration --> low concentration |
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Passive Transport |
- The movement of molecules across a cell membrane that does not require energy - Eg. Osmosis, Diffusion and Facilitated Diffusion |
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Active Transport |
- movement requiring energy normally in the form of ATP - Creates a charge of gradient in the membrane - Helps keep unwanted ions & molecules out of the membrane
Eg. Protein pumps, Endocytosis, Exocytosis |
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Diffusion |
- passive - movement of molecules from area of high concentration to an area of low concentration |
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Facilitated Diffusion |
- Passive - Carrier proteins carry molecules - High concentration --> Low concentration |
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Phagocytosis |
- Type of Endocytosis - Active - Membrane s surrounds Macromolecule and forms a phagosome - Fuses with a lysosome which digests the contents |
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Pinocytosis |
- Type of Endocytosis - Active - Cell engulfs droplets by pinching in and forming a vesicle. - Non-specific, takes in all solutes in the droplet. |
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Endocytosis |
- Active - Molecules moving into the cell - Inc. phagocytosis, pinocytosis & receptor-mediated endocytosis |
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Exocytosis |
- Active - molecules moving out of the cell via secretory vesicles - vesicles from the Golgi Apparatus fuse with the plasma membrane - Fusion causes vesicle to spill contents outside of the cell - Mostly expels waste materials |
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Receptor-mediated Endocytosis |
- Type of endocytosis - Active - Extremely selective - Receptors on plasma membrane of target cell bind specifically to ligands on the outside of the celi |
