Kinesiology 2222A/B Chapter Notes - Chapter 2: Superoxide, P53, Centriole
13 Dec 2015
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Cell biology or cytology- study of cellular structure and function. Cytoplasm: cells flexible outer surface separating internal and external, role in communication among cells and outside world, cellular contents between membrane and nucleus, cytosol fluid portion (intracellular fluid) Nucleus: organelles, houses dna, chromosomes inside containing genes. Fluid mosaic model- sea of lipids that is constantly moving. Anchored proteins and floating ones structure: lipid bilayer- phospholipids (75% contain phosphorous), cholesterol (20% in both layers) and glycolipids (5% attached to carbs, integral proteins- extend into lipid bilayer and are firmly. Glycoproteins carb groups attached to ends. Most are transmembrane (go through both sides) portions of these and glycolipids form sugary coat call glycocalyx. Functions: barrier, control flow of substances, helps id the cell to other cells (ie t cells, intercellular signaling. Functions of membrane proteins: ion channels, carriers or transporters, receptors- cellular recognition sites. Vesicle transport: active processes- cellular energy (atp)
