Cell Signalling and Transduction The signaling molecules called steroid hormones are hydrophilic and so cannot penetrate the plasma membrane never enter the blood of humans bind to cell surface receptors to trigger chemical cascades are made in one location of the body but have their effects some distance away are hydrophilic and so cannot penetrate the plasma membrane never enter the blood of humans bind to cell surface receptors to trigger chemical cascades are made in one location of the body but have their effects some distance away ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Small charged molecules, often biogenic amines function as neurotransmitters both (a) and (b) hormones none of these neurotransmitters both (a) and (b) hormones none of these 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; 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 signaling molecule; receptor; G proteins signaling molecule; target cell; G proteins ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction Which of the following statements about G proteins is false? They must be active before the cell can make needed cAMP They are involved in signal cascades They bind to and are regulated by guanine nucleotides They become activated when bound to GDP They must be active before the cell can make needed cAMP They are involved in signal cascades They bind to and are regulated by guanine nucleotides They become activated when bound to GDP 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? 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 PDGF; the blood Insulin; beta cells of the pancreas ANSWER DOWNLOAD EXAMIANS APP
Cell Signalling and Transduction In paracrine signaling, the signaling molecules affects only both (a) and (b) target cells distant from its site of synthesis in cells of an endocrine organ None of these target cells close to the cell from which it was secreted both (a) and (b) target cells distant from its site of synthesis in cells of an endocrine organ None of these target cells close to the cell from which it was secreted ANSWER DOWNLOAD EXAMIANS APP
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