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Ch 7 (Sec 7.3)
Miller and Levine Biology
Question | Answer |
---|---|
fluid mosaic model | describes the cell membrane as being composed of many different molecules and flexible in nature (P.205) |
semipermeable | some substances can pass across and others cannot (p.205) |
diffusion | the process by which PARTICLES move from an area of high concentration to low concentration (p.208) |
facilitated diffusion | diffusion through special protein channels (p.209) |
aquaporins | protein channels that allow water to pass directly through (p.210) |
osmosis | the process by which WATER moves from an area of high concentration to low concentration (p.210) |
passive transport | the movement of materials across the cell membrane without using cellular energy (p.208) |
osmotic pressure | pressure produced by the movement of water into or out of the cell (p.211) |
active transport | the movement of materials across the cell membrane that requires energy (p.212) |
endocytosis | a type of active transport that moves material into the cell (p.213) |
exocytosis | a type of active transport that moves material out of the cell (p.213) |
isotonic | when the concentration of solute and is the same on each side of the cell |
hypertonic | when the concentration of solute is greater outside the cell |
hypotonic | when the concentration of solute is greater inside the cell |