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U1-Cell Transport

QuestionAnswer
why is cellular transport important? transports materials in and out of cells through the membrane to sustain cellular function
3 types of transport: passive, active, bulk
passive no energy required
active energy required from cell
bulk lots of energy required
brownian motion when particles move in random directions
2 types of passive transport simple diffusion, facilitative diffusion
facilitative diffusion 2 types large uncharged molecules(carrier protein), charged molecules(channel protein)
osmosis diffusion of water across cell membrane
water moves from high to low _ because something low cannot get higher
hypotonic water outside to inside, plant normal
isotonic equal out and in, animal cell normal
hypertonic lots of sugar outside, water goes out
active transport sodium-potassium pump
bulk transport 2 types endocytosis(in cell), exocytosis(out cell)
endocytosis 3 types pinocytosis, phagocytosis, receptor-mediated
exocytosis reverse of endocytosis, vesicles move
Created by: bioger
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