Cell Signaling
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BIOCHEMISTRY
Cell Signaling
Cyclic Guanosine Monophosphate (cGMP)
Tiny messenger cGMP controls muscle relaxation and signals disease states
4 days ago
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What is the primary role of cGMP in cellular signaling?
Directly entering the cell nucleus to alter DNA transcription
Activating intracellular protein kinases in response to external hormone signals
Serving as a primary energy source for cellular metabolism
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BIOLOGY
Cell Signaling
Second Messengers
Tiny molecules inside cells amplify external signals into life-altering decisions
5 days ago
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Why are second messengers crucial in cellular signaling pathways?
They directly bind to extracellular signaling molecules to initiate the signal.
They amplify and diversify the signal from the first messenger to trigger specific cellular responses.
They serve only as storage molecules without influencing cellular processes.
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BIOLOGY
Cell Biology
Cell Signaling
Cell signaling orchestrates life’s complex cellular conversations across all organisms
3 Feb 2026
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Which component in cell signaling is responsible for detecting the first messenger and initiating the intracellular response?
The first messenger
The receptor
The signal itself
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