What is cell signalling?
Cell signalling is the process by which cells communicate with each other to coordinate their actions.
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What is a ligand?
A ligand is a molecule that binds to a specific receptor during cell signalling.
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What is a receptor in the context of cell signalling?
A receptor is a protein that binds to a ligand and initiates a cellular response during cell signalling.
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Why are cell-surface receptors specific?
Cell-surface receptors are specific because they have a complementary shape to the ligand.
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How does the binding of a ligand bring about a response in the cell?
Binding of a ligand causes the receptor to change shape which activates other molecules that transmit the message to bring about a response.
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