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Download Cell Membranes - stephen fleenor
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Warm-Up (9/14) On the piece of white paper from the back, answer the following question. People who recycle organic materials by composting know that green things which have been recently cut (such as grass clippings) are great sources of Nitrogen to add to their soil, while brown things which once were living but are now decomposing (such as dead leaves) are much more abundant in Carbon than Nitrogen. Why do dead things no longer contain an abundance of Nitrogen? green things brown things p. 127 The Fluid Mosaic Model p. 127 The Fluid Mosaic Model The Fluid Mosaic Model p. 127 Lipid embedded inside membrane The Fluid Mosaic Model p. 127 Lipid embedded inside membrane Protein going through the membrane The Fluid Mosaic Model p. 127 Protein on inside or outside surface Lipid embedded inside membrane Protein going through the membrane p. 127 The Fluid Mosaic Model Protein with carbohydrate attachment Protein on inside or outside surface Lipid embedded inside membrane Protein going through the membrane p. 127 The Fluid Mosaic Model Protein with carbohydrate attachment Lipid with carbohydrate attachment Protein on inside or outside surface Lipid embedded inside membrane Protein going through the membrane p. 127 The Fluid Mosaic Model Protein with carbohydrate attachment Lipid with carbohydrate attachment Protein on inside or outside surface Lipid embedded inside membrane Protein going through the membrane The Fluid Mosaic Model p. 127 What are the two parts of this lipid? The Fluid Mosaic Model p. 127 What are the two parts of this lipid? p. 126 Nothing is preventing them from moving sideways (laterally), and they are! The Fluid Mosaic Model p. 127 What about the tail structure is causing this “kink”? The Fluid Mosaic Model a “kink” p. 127 The “kink” slightly promotes lateral movement The Fluid Mosaic Model a “kink” Independent Practice p. 141 questions 2 and 3… …and answer this question: What kinds of amino acid side chains do you expect to be on the surface of a protein passing through the inside part of the bilayer? Why? Surface Area Which will cook faster? Surface Area of a Cube Surface Area = s x s x 6 3 cm 1 cm Volume = s x s x s 1 cm 1 cm 1 cm 1 cm 1 cm 3 cm Microvilli of the Small Intestine Microvilli of the Small Intestine A Which cell has more surface area? Which cell can absorb more nutrients? B Independent Practice Closure (9/14) Based on the phospholipid bilayer structure of cell membranes, explain how a cell is able to retain water. Scale from 1-10
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