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Transcript
Chap. 5 “Membranes” Notes Outline: Slide 2 (Phospholipids): Describe the structure of a phospholipid. _________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe how a phospholipid bilayer is created. __________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ The phospholipid bilayer is fluid. What does this mean and why is it important to the cell? _________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ The phospholipid bilayer has two purposes. What are they? ___________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the endomembrane system. _______________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the movement of water and nutrients through the phospholipid bilayer. ___________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 3 (Membrane Structure): Where are the transmembrane proteins found? ___________________________________________________________________ Describe the purpose of a transmembrane protein. _______________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Why are these proteins called integral proteins? __________________________________________________________________ _________________________________________________________________________________________________________________________ Where is the internal protein network found? _____________________________________________________________________ Describe the purpose of the internal protein network. ____________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 4(Membrane Structure): Where are the cell surface identity markers found? _______________________________________________________________ Describe the purpose of the cell surface identity marker. _________________________________________________________ _________________________________________________________________________________________________________________________ Why are they necessary? ____________________________________________________________________________________________ _________________________________________________________________________________________________________________________ How are they used to identify a particular cell? ___________________________________________________________________ _________________________________________________________________________________________________________________________ Where are the protein pumps found? _______________________________________________________________________________ Describe the purpose of the protein pump. ________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Where are the cholesterols found? __________________________________________________________________________________ Describe the purposes of the cholesterols. _________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Where are the receptor proteins found? ___________________________________________________________________________ Describe the purpose of the receptor proteins. ____________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 5(Membrane Protein Functions): Describe the purpose of the transport proteins. ___________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Contrast a channel transport protein to a carrier transport protein. _____________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the purpose of enzymes. __________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the purposes of the cell to cell adhesion proteins. _______________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Give an example of a temporary cell to cell adhesion and a permanent cell to cell adhesion. _________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the purpose of the cytoskeleton attachment proteins. __________________________________________________ _________________________________________________________________________________________________________________________ Slide 6 (Diffusion – Passive Transport): Define the terms diffusion and semi-permeable. __________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Define the term passive transport. __________________________________________________________________________________ _________________________________________________________________________________________________________________________ What is the force behind diffusion by passive transport? __________________________________________________________ Explain how this process works. ___________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 7 (Facilitated Diffusion): Compare diffusion through passive transport with facilitated diffusion. _______________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Compare diffusion through passive transport with facilitated diffusion. _______________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the use of channel proteins in facilitated diffusion. ____________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the use of carrier proteins in facilitated diffusion. ____________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Define the term saturation point. ___________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 8 (Active transport): Contrast passive transport with active transport. _________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 9 (Sodium – Potassium Pump): Explain how the sodium – potassium pump works. ______________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 10 (Osmosis): Compare/contrast diffusion and osmosis. __________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Personal notes: _______________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 11 (Cells in Solution – Isotonic): Define the term isotonic solution then explain what it means in your own words. _____________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the movement of water in an isotonic solution. When does this movement stop? __________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 11 (Cells in Solution – Hypotonic): Define the term hypotonic solution then explain what it means in your own words. __________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the movement of water in a hypotonic solution. ________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 12 (Cells in Solution – Hypertonic): Define the term hypertonic solution then explain what it means in your own words. _________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Describe the movement of water in a hypertonic solution. ______________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 13(Review): Personal notes: _______________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 14 (Bulk Transport – Endocytosis): The movement into the cell of a molecule that is too large to fit through the membrane or a transport protein is called ____________________. The movement of solids in this manner is called ________________________. The movement of water in this manner is called ___________________________________. Describe how the cell brings these large molecules into the cell. ________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ Slide 15 (Bulk Transport – Exocytosis): Describe how the cell moves these large molecules out of the cell. ______________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________ If part of the cell’s membrane breaks off to form a vesicle each time endocytosis occurs, why doesn’t the cell get smaller and smaller and smaller? __________________________________________________________________________ _________________________________________________________________________________________________________________________ _________________________________________________________________________________________________________________________
