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Ch 7 (Sec 7.3)

Miller and Levine Biology

QuestionAnswer
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
Created by: zhaas92577