Cell Signalling and Transduction The binding of ligands to many G-proteins linked receptors leads to shortlived decrease in the concentration of certain intracellular signaling molecules called second messenger increase in the concentration of certain intracellular signaling molecules called second messenger increase in the concentration of certain extracellular signaling molecules called first messenger decrease in the concentration of certain extracellular signaling molecules called first messenger decrease in the concentration of certain intracellular signaling molecules called second messenger increase in the concentration of certain intracellular signaling molecules called second messenger increase in the concentration of certain extracellular signaling molecules called first messenger decrease in the concentration of certain extracellular signaling molecules called first messenger ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Why is it that inhaling nitric oxide reduces blood pressure only in the lung tissue and not elsewhere in the body*? Because other body tissues use a different signaling molecule None of these Because nitric oxide cannot cross cell membranes and enter the blood Because nitric oxide breaks down quickly and thus cannot travel far Because other body tissues use a different signaling molecule None of these Because nitric oxide cannot cross cell membranes and enter the blood Because nitric oxide breaks down quickly and thus cannot travel far ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ . signaling molecule; receptor; G proteins signaling molecule; target cell; G proteins signaling molecule; target cell; receptors kinase; receptor; proteases signaling molecule; receptor; G proteins signaling molecule; target cell; G proteins signaling molecule; target cell; receptors kinase; receptor; proteases ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following statements about G proteins is false? They become activated when bound to GDP They are involved in signal cascades They must be active before the cell can make needed cAMP They bind to and are regulated by guanine nucleotides They become activated when bound to GDP They are involved in signal cascades They must be active before the cell can make needed cAMP They bind to and are regulated by guanine nucleotides ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction In the signal transduction mechanism known as protein phosphorylation phosphorylated proteins act with enzymes to trigger the signal cascade All of these the signaling molecule binds to a surface receptor receptor kinases play a key role in triggering the signal cascade phosphorylated proteins act with enzymes to trigger the signal cascade All of these the signaling molecule binds to a surface receptor receptor kinases play a key role in triggering the signal cascade ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following is a hormone whose action requires a cell surface receptor? Growth factors Progesterone Nitric oxide Adrenaline Growth factors Progesterone Nitric oxide Adrenaline ANSWER DOWNLOAD EXAMIANS APP
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