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25 Cards in this Set
- Front
- Back
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What does the cell membrane do?
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-Allows for the transport of molecules
-Maintains homeostasis |
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What is the permeability of the cell membrane?
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Semi-permeable
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The cell membrane is made up of the...
What are the main parts? |
Phospholipid bilayer
Charged phosphate group, glycerol, and 2 fa chains |
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What does the marker protein do?
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Identifies cell to distinguish it from other cells
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What does the channel protein do?
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Lets large or charged molecules enter/exit the cell through facilitated diffusion
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What does the receptor protein do?
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Detects a signal molecule and has different shapes for different functions
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What do cell pumps do?
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Let charged molecules in using ATP
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What is passive transport?
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Movement of molecules across a membrane w/out energy input from the cell
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What is osmosis?
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Water molecules move across a semi permeable membrane from high to low water concentration
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What is diffusion?
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Movement of fluid or gas molecules from high to low concentration
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What is facilitated diffusion?
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Moving large or charged molecules across a membrane through channel proteins
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What is active transport?
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Drives molecules across a membrane from low to high concentration w/ energy input from cell
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What is endocytosis?
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Taking liquids/molecules into the cell through the membrane
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What is exocytosis?
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Opposite of endocytosis, substances out of cell by fusion
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What are phagocytosis and pinocytosis?
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A type of endocytosis where particles are taken in by the membrane
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What is a solute and what is a solvent?
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Solute- substance divided in solvent
Solvent- substancr solute is being dissolved into The universal solvent is water |
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What is tonicity?
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Amt of solute in solution
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What is an isotonic solution?
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The amt of solute surrounding the cell is equal to amt of solute in cell so size doesn't change
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What is a hypertonic solution?
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Amt of solute in solution is greater than in cell so it shrinks
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What is a hypotonic solution?
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Amt of solute in solution is less than in cell so it swells
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What is turgor pressure?
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Water puts pressure on cell wall which holds the plant upright
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What is plasmolysis?
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Causes plant to wilt w/ not enough water
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What is crenation?
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Animal cells shrivel when placed in hypertonic solution
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What is cytolysis?
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When animal cells are in a hypotonic solution the cells burst
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What is osmotic pressure?
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Pressure needed to prevent inward flow of water
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