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1 November, 20:15

Which class of molecules functions as chemical signals?

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  1. 1 November, 23:54
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    A hormone is a molecule that functions as a chemical signal. A hormone is a chemical released by a cell or a gland in one part of the body that sends out messages that affect cells in other parts of the organism. Endocrine hormone molecules are secreted (released) directly into the bloodstream.!
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