Cell Signalling and Transduction Which of the following statements about G proteins is false? They bind to and are regulated by guanine nucleotides They are involved in signal cascades They must be active before the cell can make needed cAMP They become activated when bound to GDP They bind to and are regulated by guanine nucleotides They are involved in signal cascades They must be active before the cell can make needed cAMP They become activated when bound to GDP ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell? It contains the receptor for the signaling molecule It is incapable of signal transduction It is also the site of production for the signaling molecule It is in the heart muscle It contains the receptor for the signaling molecule It is incapable of signal transduction It is also the site of production for the signaling molecule It is in the heart muscle ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located? PDGF; the blood Insulin; beta cells of the pancreas NGF; the nerves involved in simple reflexes Insulin; many different cell types that use glucose for fuel PDGF; the blood Insulin; beta cells of the pancreas NGF; the nerves involved in simple reflexes Insulin; many different cell types that use glucose for fuel ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction In vasodilation, proper nerve signals sent to blood vessels cause All of these the release of nitric oxide from endothelial cells relaxation of smooth muscle cells reduced blood pressure All of these the release of nitric oxide from endothelial cells relaxation of smooth muscle cells reduced blood pressure ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction The hormone or ligand can be considered as both (a) and (b) first messenger none of these second messenger both (a) and (b) first messenger none of these second messenger ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following is not a type of signaling molecule? Testosterone Adenylate cyclase Insulin Thyroxin Testosterone Adenylate cyclase Insulin Thyroxin ANSWER DOWNLOAD EXAMIANS APP
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