BIOL 030 Chapter Notes - Chapter 7.2: Signal Transduction, Hydrophile, Electronegativity
26 Oct 2018
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Biol 30 chapter 7. 2 how do cells respond to fear: objectives, describe signal transduction using a specific example, explain hallmarks of signal transduction in general. Epinephrine: epinephrine: secreted by adrenal glands to inform every cell that there is danger, also known as adrenaline, contains two of four common electronegative elements, nitrogen, oxygen, phosphorous, sulfur, hydrophilic, cannot cross any membranes composed of phospholipid bilayers. Signal transduction: signal transduction: conveys hydrophilic molecular information from extracellular environment to intracellular, because the modulator is allosteric, the receptor changes shape, overview. Initiated by ligand epinephrine binding to its receptor: protein kinase a (pka): activated by camp and phosphorylates several different proteins, functions, initiate breakdown of old glycogen, stop production of new glycogen, release of glucose into system is adaptive. Is epinephrine really the hormone responsible for glucose release from the. Consequences of phosphorylation: when pka increases, the less active glycogen synthases become, enzyme activity not linearly increased with the amount of pka.
