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13 Cards in this Set
- Front
- Back
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What is osmosis?
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the diffusion of water in and out or a cell.
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What is diffusion?
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the movement of molecules from a higher to a lower concentration.
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What is facilitated diffusion?
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when molecules diffuse through a membrane by transport proteins NO energy is required high -> low gradient with protein help with movement.
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What is active transport?
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Requires ATP as molecules move against a gradient.
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List the Factors that affect the rate of movement.
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Temperature
Concentration Medium that it passes through (gas, liquid, or solid.(f,m,s)) Size of molecules (glycogen= larger=slower)(glucose=smaller =faster) |
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What is phagocytosis?
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The wrapping around of something (solid) to bring into the cell.
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What is pinocytosis?
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The wrapping around of a fluid to bring into the cell.
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What is a peripheral protein?
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A protein that is inside or outside the surface of the membrane.
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What is an integral protein?
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A protein within a membrane [has both hydrophillic and hydrophobic parts]
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what is a Solute?
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A substance that can be dissolved
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What is a polar molecule movement?
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When hydrophillic molecules are stopped by the lipid layer.
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What is a nonpolar molecule movement?
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When hydrophobic molecules can dissolve into the lipid layer and cross over.
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What is the formula for water potential?
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water potential = solute potential (-) + pressure potential (+)
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