Glycogen breakdown is stimulated by a signaling cascade that is an excellent example of signal amplification. Amplification in glycogen breakdown is where a small number of signal molecules (hormones) activate a rapid and large release of glucose. Which of the following is the correct sequence for this signaling cascade in skeletal.muscle cells? O epinephrine, GPCR, Protein kinase A (PKA), phosphorylase b kinase O insulin, insulin receptor (RTK), protein phosphatase-1 (PP1). glycogen phosphorylase O glucagon, GPCR, Protein kinase A (PKA), glycogen synthase O epinephrine, protein phosphatase-1 (PP1), phosphorylase b kinase, glycogen synthase insulin, insulin receptor (RTK), protein phosphatase-1 (PP1), bifunctional enzyme, glycogen synthase

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A:

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.