BIO 3124 Lecture Notes - Lecture 4: Microfilament, Lysosome, Phagocytosis
24 Sep 2016
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Small organisms high ratio of surface area relative to volume o. Rapid growth doesn"t take much time, to make another self, rapid reproduction. High cell density can have a lot of cells in little space o. No human in a cup but could put like 5000 microorgs. Selective barrier selective about what can go through o o. Allows the cell to have a diff conc of solute from the outside. Allows the excretion of waste products can"t eliminate waste bc it would come back if it was completely permeable. In bacteria it occurs in cmb, euks in mitochondria. 2 layers of phospholipids, one exposed to ecm (hydrophilic-po4), fatty acid chain is hydrophobic and will interact with each other to avoid water. The fatty acids have both properties so they are amphipathic. Hypertonic all bacterial cells with a cell wall has a high solute conc inside compared to outside (most bacteria)
