BIOL 1010 Lecture : Cell Communication.docx
6 Oct 2014
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Sending signal from one cell to the other cell: the junctions allow the heart to beat in unison, signaling can be through direct contact, gap junctions, in which small molecules can pass, cell cell recognition, in which one cell recognizes another cell, signaling can be local, paracrine. Receptors in the cytoplasmic membrane: g protein coupled receptors (remember that g protein is an enzyme that hydrolyzes gdp) membrane, have 7 trans membrane domains (alpha helixes that go through the, the part that is going to bind the hormone is the top purple squiggly part, they are asymetric, many are sensory receptors (vision, taste, odour, we have different sensory receptors for odour i. 400, but have thousands of copies: dogs have 800, rodents (mice, rats) have 1200, world record is elephants! (2000, g proteins, not the receptor, a small protein that binds to gdp in its inactive state, when the g proteins become activated (by the g protein coupled.
