HLSC 2P09 Lecture Notes - Lecture 2: Secretion, Plasmid, Homeostasis
27 Jan 2018
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Document Summary
Cell membrane (plasma membrane: transduction and communication, consists of, phospholipid bilayer, transport proteins, cholesterol, carbohydrates. Membrane proteins: hydrophobic regions in the pm, channel proteins facilitate the movement of ions across pm. Cell structure and function: cytoplasm, semifluid part between cell membrane and nuclear membrane, consists of many enzymes and proteins, cytosol, clear fluid portion of the cytoplasm, nucleus: In most cells: double membrane (nuclear envelope, contains, chromatin, nucleolus; site of rrna production. Endoplasmic reticulum: smooth or agranular er, steroid hormone production and inactivation, site for ca storage in muscles, rough or granular er, ribosomes site for protein synthesis and excretion. Ribosomes: protein + rrna, translation of mrna and protein synthesis. Golgi apparatus: stacked membranes, later stages of protein synthesis. Hlsc 2p09: processes and packages material to be secreted. Mitochondria: site of production for cells energy, contain their own dna. Lysosomes: enzymatic breakdown of foreign material, digest/destroy microbes. Secretion vesicles: transport proteins from ga to cell surface, exocytosis.
