BIOL 1201 : Exam 2 Notes BIo 1201
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The interior of a cell is different than its environment. How to defend the internal environment but still communicate with the external environment. ***biological membranes consist of phospholipids and proteins fig. Species with a body temperature of 10c will have fluidity similar to a species with a body temperature of 20c. Raised pigs wearing underwear in a hot room. Membrane fluidity adjusted by changing the ratio of unsaturated to saturated fatty acids. 7. 7 evidence for the drifting of membrane proteins. 7. 5 the detailed structure of an animal cell"s plasma membrane, in cross section. What about against the gradient? e. g. sodium 5- 15 mm in the cell; 145 mm outside. *when solute concentrations are equal on either side of the barrier it means the molecules are no longer moving. There is no net change in solute concentration. Only some types of molecules pass through fig. From regions of high concentration to low concentration.
