BIOL 1201 Lecture : Lecture 11 Sep 19
Document Summary
Readings: pgs 112-122 in campbell biology 9th ed. Mastering biology: homework 9 (due wednesday before 10 am) Continue: cell cytoskeleton from lecture 10 study guide. 7. 3: phospholipid bilayer with integral/peripheral proteins (carbohydrates, steroids, membranes are dynamic fluid mosaic model, selectively permeability control transport into and out of the cell. Membrane transport of h2o/solutes: diffusion (fig. 7. 13) passive transport of solute molecules from areas of high concentration to low concentration, osmosis diffusion of water across a selectively permeable membrane. In figure, the left side shows a hypotonic solute and the right side shows a hypertonic solute; the second figure shows equilibrium between the two sides. Water molecules move from low (hypotonic) to high (hypertonic) solute concentration. Hypertonic high solute concentration (isotonic ) What are integral and peripheral membrane proteins: define diffusion, selectively permeable membrane and osmosis, the concentration of solutes in a cell can be 200 mm (total number of moles of solute per liter of cell solution).
