THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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transport a signal through the lipid bilayer portion of the plasma membrane.
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relay a signal from the outside to the inside of the cell.
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relay the message from the inside of the membrane throughout the cytoplasm.
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amplify the message by phosphorylating proteins.
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Detailed explanation-1: -Second messengers are molecules that relay signals received at receptors on the cell surface-such as the arrival of protein hormones, growth factors, etc.-to target molecules in the cytosol and/or nucleus.
Detailed explanation-2: -All signal transduction pathways have several properties in common. They all (1) use protein kinases (2) use secondary messengers (3) depend on the interactions of proteins and other molecules (4) must be properly terminated after they carried out their function.
Detailed explanation-3: -The responses to the extracellular signal are generated by diverse signal transduction mechanisms that frequently involve small intracellular molecules (second messengers) that transmit signals from activated receptors to the cell interior, resulting in changes in the expression of genes and the activity of enzymes.