BIOL 1001 Chapter : Biology 4
Document Summary
Might be chapter 5- cell membranes check chapter. We do not find any water in the middle of the membrane because fatty acids inside are hydrophobic. Membrane function: selectively isolates inside of the cell from outside, regulates exchange of substances in and out of the cell, communication with other cells. Change the triglyceride and put in a polar group which is water loving and the tail which is water hating figure 4-1. Membrane proteins: transport proteins: regulate movement through membrane. Carrier proteins: receptor proteins: trigger cellular response when specific molecules attach, recognition proteins: id tags and attachment sites, glycoproteins. Aquaporins allow this: passive transport: movement down concentration gradient, no e required. Diffusion- high concentration to low concentration: simple diffusion: goes across membrane without help. Has to be uncharged and nonpolar like oxygen and hydrogen gas: facilitated diffusion goes across membrane with help.
