Chapter 4

Chapter 4 - Isotonic Solution The Effects of Osmosis (Fig....

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Chapter 4 Chapter 4 1 Chapter 4: Cell Membranes
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Phospholipid Review Fatty Acid Glycerol Polar group Polar group Glycerol Fatty Acid Change from Change from Triglyceride to Triglyceride to Phospholipid Phospholipid
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Oligosaccharides Membrane Proteins Cholesterol Outer Surface Fluid Mosaic Model of Membrane Structure (Fig. 4-1) Cytoplasm
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Diffusion of Dye in Water (Fig. 4-2) Time 0 Time 0 Steep Steep Concentration Concentration Gradient Gradient Time 1 Time 1 Reduced Reduced Concentration Concentration Gradient Gradient Dispersing Dispersing Time 2 Time 2 No No Concentration Concentration Gradient Gradient Random Random Dispersal Dispersal
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Simple Diffusion (Fig. 4-3a) (extracellular fluid) (cytoplasm) Some molecules Some molecules diffuse freely diffuse freely across across e.g e.g ., ., CO CO 2 2 O O 2 2
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Facilitated Diffusion Small charged molecules use channels e.g., ions Large molecules use carriers e.g., A.A., sugars, small proteins Fig. 4-3b Fig. 4-3c
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Osmosis Diffusion of H 2 O across differentially permeable membrane
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Normal RBCs Isotonic Solution
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Unformatted text preview: Isotonic Solution The Effects of Osmosis (Fig. 4-5) Equal movement of water into and out of cells Net movement of water out of cells Net movement of water into cells Shriveled RBCs Swollen RBCs Hypertonic Solution Hypertonic Solution Hypotonic Solution Hypotonic Solution Active Transport Steps (Fig. 4-6) Inside Cell Outside Cell 1 2 3 4 Transported Molecule Energy Provider Spent Energy Provider Endocytosis (Fig. 4-7) (extracellular fluid) Pinocytosis vesicle containing extracellular fluid) (cytoplasm) 1 2 3 cell (extracellular fluid) (cytoplasm) 1 2 3 4 coated pit forming Receptor-mediated Endocytosis Phagocytosis coated vesicle nutrients receptors food particle pseudopod particle enclosed in food vacuole Exocytosis (Fig. 4-9) (cytoplasm) 1 Vesicle (extracellular fluid) plasma membrane 2 Secreted Material 3 Chapter 4 Chapter 4 12 12 The End...
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This note was uploaded on 07/15/2008 for the course BIOL 1001 taught by Professor Minor during the Spring '08 term at LSU.

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Chapter 4 - Isotonic Solution The Effects of Osmosis (Fig....

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