BIOL-N - Biology BIOL-N 217 Lecture Notes - Lecture 3: Cytosol, Simple Squamous Epithelium, Cardiac Muscle
13 Sep 2017
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Some outside the body external (anything with direct pathway) Content: basically, the same except for proteins. Has its own concentration of electrolytes, ion, nutrients. Plasma interstitium & extracellular intracellular. On the edge, not a part of the membrane, sitting on or up next to membrane. Protein bond to fatty acid tail or sphingolipid in bilayer. Insoluble particles: glycogen, lipid droplets, ribosomes & polysomes. Membrane bound with specific structure & function. Golgi apparatus manipulate chemicals, protein synthesis. Proteoglycans (proteins and sugars) & protein fibers. Cell junctions (two cells come together, can be structural or communication junction) Gap junctions there is a gap, hole in membrane between two cells. Tight junctions seal between two cells, do not allow material to slip through space between two adjacent cell. Digestive tract: infants do not have fully developed tight junctions, easy for bacteria to escape gut. Desmosomes anchoring points, proteins that extend from one cell to another. Entering or exiting the body proper .
