ENDOCRINE ORGANS AND RESPIRATORY SYSTEM
ENDOCRINE ORGANS
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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
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relay a signal from the outside to the inside of the cell
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relay message from the inside of the mebrane throughout the cytoplasm
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dampen the message
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Detailed explanation-1: -Second messengers are small molecules and ions that relay signals received by cell-surface receptors to effector proteins.
Detailed explanation-2: -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-3: -Many second messenger molecules are small and therefore diffuse rapidly through the cytoplasm, enabling information to move quickly throughout the cell.
Detailed explanation-4: -What are second messengers? Signals received by receptors at the cell surface or, in some cases, within the cell are often relayed throughout the cell via generation of small, rapidly diffusing molecules referred to as second messengers.
Detailed explanation-5: -In the brain, neurons make use of both transient and enduring forms of synaptic transmission, using receptors that gate ion channels directly or second messengers. Synaptic actions by second messengers can close ion channels that are open at the resting potential, thereby decreasing the conductance of the membrane.