BSC 1010L Study Guide - Midterm Guide: Paracrine Signalling, Endocrine System, Cell Signaling
19 May 2017
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Immunity local signaling animal cells may communicate by direct contact paracrine signaling local signaling. Travel via the circulatory system three stages of cell signaling. G protein-coupled receptors receptor tyrosine kinases ion channel receptors. G protein-coupled receptors cell surface transmembrane receptors that work with the help of a g protein. G proteins bind the energy-rich gtp receptor tyrosine kinases membrane receptors that attach phosphates to tyrosines ligand-gated ion channel receptor acts as a gate when the receptor changes shape. Why are the multiple steps in signal transduction beneficial. Multistep pathways can greatly amplify a signal. What other function do pathways have? regulate the activity of enzymes what are the many molecules in transduction pathways kinases what can phosphorylation and dephosphorylation regulate? the activity of proteins, acting as a molecular switch. 3 examples of responses the cell can have to a signal regulation of gene expression regulation of activity of an enzyme induction of apoptosis (programmed cell death)
