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The ____________________ must be protected by the secondary flame to prevent the atmosphere from contaminating the metal.
Chemical Signal Molecules
Substances released by cells that transmit messages to other parts of the body to initiate, amplify, or inhibit biological processes.
Enzymes
Biological molecules that act as catalysts to speed up chemical reactions in living organisms, crucial for metabolic processes.
Ligands
Molecules that bind to other (usually larger) molecules, often to a protein or receptor, causing a response or interaction.
Receptor Sites
Specific locations on a cell surface or within a cell that are designed to bind with particular substances like hormones, neurotransmitters, or drugs.
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