Term
| The cell membrane is made up of a double layer of these. |
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Definition
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Term
| The end of the phospholipid molecule that is hydrophilic. |
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Definition
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Term
| The end of the phospholipid molecule that is hydrophobic. |
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Definition
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Term
| The model of the cell membrane which says that the membrane is constantly in motion. |
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Definition
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Term
| What three things determine which particles will make it across the cell membrane. |
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Definition
| size, shape, electrical charge |
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Term
| The term for the difference in concentration between two areas. |
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Definition
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Term
| This state occurs when molecules are evenly distributed. |
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Definition
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Term
| The type of transport in which particles move down a concentration and does not require the input of energy. |
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Definition
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Term
| The movement of small particles down the concentration gradient which results in the particles moving into or out of the cell. |
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Definition
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Term
| The movement of water down the concentration gradient which results in water moving into or out of the cell. |
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Definition
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Term
| When there is more water in the solution outside a cell than inside the cell, then the solution is said to be ________. |
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Definition
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Term
| When a cell is in a solution that is hypotonic, water will flow from the ______ to the _______. |
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Definition
| from the solution to the cell |
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Term
| When the concentration of water in the solution outside of a cell is less than the concentration of water within the cell, the solution is said to be ________. |
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Definition
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Term
| When a cell is in a hypertonic solution, water will flow from the ______ to the ______. |
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Definition
| from the cell to the solution |
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Term
| When a cell is in a solution in which the concentration of water in the solution is the same as the concentration of water within the cell, then the solution is said to be. |
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Definition
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Term
| The type of passive transport which makes use of transport proteins. |
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Definition
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Term
| The type of transport protein that changes shape to allow certain molecules to cross the cell membrane. |
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Definition
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Term
| The type of transport protein which form tunnel-like pores, filled with water, and allow charged ions in and out of the cell. |
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Definition
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Term
| The type of transport in which particles move against the concentration gradient and requires the input of energy. |
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Definition
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Term
| The type of transport used by root cells. |
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Definition
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Term
| This type of transport is used to move particles across the cell membrane that are too big to be moved by active or passive transport. |
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Definition
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Term
| The form of endocytosis in which a cell "eats" large particles or other cells. |
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Definition
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Term
| The form of endocytosis that occurs when cells "drink" droplets of fluid. |
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Definition
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Term
| The form of endocytosis which uses proteins called receptors on the membrane surface to identify specific compounds and cells in their environment. |
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Definition
| receptor-mediated endocytosis |
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Term
| The form of transport used by HIV to enter a cell. |
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Definition
receptor-mediated endocytosis |
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Term
| As a cell grows its _______ increases much faster than its ________. |
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Definition
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Term
| Why is it important for a cell to have a HIGH surface area to volume ratio? |
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Definition
| cells with low surface area to volume ratios could either starve to death or be poisoned from the buildup of its own wastes. |
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