ANP 1105 Chapter Notes -Glycocalyx, Tonicity, Exocytosis
11 Mar 2014
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Anp1105: chapter 2: cellular physiology of nerve muscle. (part 1) Basic structure according to fluid mosaic model: some proteins could move, because it is semi fluid. They can expand as the cell grows, accommodate to the entry of something. If there"s too much, those plasma membranes become less fluid. Integral membrane proteins: area of the molecule needs to be hydrophobic and at either end there will be a hydrophilic. Peripheral proteins: attached to integral proteins (usually internal side of pm); can be enzymes, involved in attachment functions, shape changes Cytoskeleton: anchor to pm; can also interact with receptors. Glycocalyx: ensemble of carbohydrates attached to lipids and proteins on the extracellular face. Cholesterol: overall: reduces general membrane fluidity + stabilizes it"s structure- too much causes membrane to lose flexibility. Functions: i) ii) iii) iv) v) vi) 2. 1. 1. 3: distinguish between tight junctions, desmosomes, and gap junctions:
