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24 Cards in this Set
- Front
- Back
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Movement of molecules that require cell energy
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Active transport
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Regulates passage of materials into and out of cells
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Cell membrane
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Shrinking of cell due to water loss
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Crenation
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Bursting due to taking too much water into cell
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Cytolysis
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Type of passive transport; high to low w/ concentration. Net movement of a substance down a concentration gradient
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Diffusion
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Limp cell when water leaves it
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Flaccid
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Accepted model of the cell membrane because it is thought that the structure of the bilayer is fluid
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Fluid mosaic model
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Method which proved the fluid mosaic model
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Freeze fracture
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Passive transport; Driven by the potential energy of the concentration gradient. Diffusion with the help of transport proteins
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Facilitated diffusion
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Open only in response to electrical or chemical stimuli
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Gated channels
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Usually on outer surface (polar); allow for adhesion and recognition of cells
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Glycolipid
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Hydrophilic heads that point outwards
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Hydrophilic part of cell membrane
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Hydrophobic tails that point inwards
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Hydrophobic part of cell membrane
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High solute concentration in solution - Water goes out of cell
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Hypertonic
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Low solute concentration in solution - Water goes into cell
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Hypotonic
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Proteins within the membrane
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Integral proteins
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Equal solute concentration and water in both solutions; reaches equilibrium
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Isotonic
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Device used to measure osmotic pressure
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Osmometer
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Regulation of water balance by organisms in a hypo-hyper environment
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Osmoregulation
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Movement of water molecules across cell membrane
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Osmosis
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No energy needed; movement of materials across cell membrane
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Passive transport
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Proteins on the cytoplasmic side
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Peripheral proteins
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Cell membrane pulls away from cell wall as water moves
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Plasmolysis
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Water movement from one place to another because of differences in potential energy
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Water potential
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