BIOLOGY 2B03 Final: exam review
8 Dec 2018
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In suitable environment the anterior end of the slug will form the stalk and the posterior end will form the spores f the fruiting body which is about 2mm tall. Aggregation is a chemotactic response: the receptor of camp is a transmembrane protein called a g-protein coupled receptor or. Gpcr: the extracellular domain of the receptor binds specifically to camp, activating the receptor. In response the cells reorganize their intracellular actin network to move towards the sources of the signal. Human neutrophil cell crawling: even with our own bodies single cells can move towards chemical signals, white blood cells called neutrophil are able to respond to a signal produced by bacteria that have invaded our bodies. In the example they are responding to a chemical produced by the bacterium. A receptor on the surface of the neutrophil binds to this chemical signal, activating a series of internal changes that facilitates directional movement.
