BIOL 103 Lecture Notes - Lecture 2: Vacuole, Antibody, Lysosome
9 Jun 2016
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Document Summary
Intracellular digestion: involves bringing food into cell itself for digestion, usually through a food vacuole. Involves phagocytosis: the ingestion of bacteria or other material by phagocytes and amoeboid protozoans, food enters the cell through a food vacuole, meets with a lysosome, and is digested. Anything that can"t be digested is expelled from the cell via exocytosis. Snares (a protein) and ca2+ (positive ion needed to fuse membranes since they are both negative) are involved. Protozoa can get rid of things using exocytosis. The molecular biology of phagocytosis in protozoans can be complicated, for example okada and colleagues showed that there were 85 different proteins involved in the process in a genus that infects up to 10% people. Phagocytosis does occur in our cells (the cells of vertebrates) more specifically this happens in our immune system with the white blood cells (macrophages)
