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6 Cards in this Set
- Front
- Back
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What is the Fluid Mosaic Model?
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The plasma membrane made of proteins, phospholipid bilayer, glycoproteins w carbs attached, glycolipids, and microfilaments of the cytoskeleton
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Compare and contrast simple and facilitated diffusion
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Facilitated is diffusion that uses a specific transport protein; Simple is the net movement of a substance down(high to low) the concentration gradient w/o protein
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Compare and contrast passive and active transport
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Active requires energy to move thru a protein against the gradient(low to high); Passive is the diffusion down the gradient using transport protein and no energy
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What is the process of osmosis?Predict the direction of water movement based on solute concentrations.
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Osmosis is the diffusion of water across a semi-permeable membrane; It is predicted by the tonicity of the cell
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Describe how cells take or expel large molecules or particles
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Through exo- and endo-cytosis, exo- is the is the movement out, and endo is the intake; By 3 kinds - phaygo(eating), pino(drinking) and receptor mediated(specific)
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How can proteins be positioned within the plasma membrane?
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They are positioned by their functions -cell to cell recognition, junctions, and by integrins that give the phosolipid layer its strength.
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