CHAPTER 03 + LAB Movements through Cell …

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1CHAPTER 03 + LABANATOMY & PHYSIOLOGY IBIO 211:Dr. Lawrence G. illustrations are courtesy of wait 20 secondsbefore starting slide click orArrow keys to ESCAPE Key to throughCell MembranesAlso see:Cells: Summary Notes2Movements Into and Out of the CellPassive transport (Physical processes)requires no cellular energysimple diffusionfacilitated diffusionosmosisfiltrationActive transport (Physiological processes)requires cellular energyendocytosisexocytosistranscytosisR eminder: Review states of matter/kinetic Diffusionmovement of substances from regions of higher concentration toregions of lower , carbon dioxide and lipid-soluble substances4Facilitated Diffusiondiffusion across a membrane with thehelp of a channel or carrier Glucose5Osmosismovement of water through a selectively permeablemembrane from regions of higher concentration toregions of lower moves toward a higher concentration of solutes6Osmotic Pressure ability of osmosis to generate enough pressure tomove a volume of waterOsmotic pressure increases as the concentrationof nonpermeable solutes increasesOsmosisisotonicsame osmotic pressureRBC: normal physiological saline ( NaCl)hypotonic lower osmotic pressureRBC: hemolysis ( , NaCl)hypertonichigher osmotic pressureRBC: crenation ( , NaCl)7Filtrationsmaller molecules are forced through porous pressure is important in the : molecules leaving

Movements Into and Out of the Cell 2 Passive Transport (Physical processes) requires no cellular energy simple diffusion facilitated diffusion osmosis filtration Active Transport

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