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Leptin is a hormone released by
Density
A characteristic indicating the amount of mass contained in a given volume of a material.
Volume
The quantity of three-dimensional space taken up by an object or material, expressed in cubic units.
Substance
A form of matter with a specific chemical composition and distinct properties, distinct from mixtures.
Chemical Sample
A small part or quantity of a chemical substance taken to show the quality or nature of the whole.
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