curÂ·renÂ·cy. (kÃ»râ²Én-sÄ, kÅ­râ²-) n. pl. curÂ·renÂ·cies. 1. Money in any form when in actual use as a medium of exchange, especially circulating paper money. 2. Transmission from person to person as a medium of exchange; circulation: coins now in currency. 3. General acceptance or use; prevalence: the currency of a slang term.
(T/F) Most hormones can be classified chemically as either amino-acid based or steroids. True. Most hormones belong to the amino-acid group, while others (steroids) are derived from cholesterol.
I. Hormones are chemicals that are secreted into the blood by endocrine glands. A. The chemical classes of hormones include amines, polypeptides, glycoproteins and steroids. B. Nonpolar hormones, which can pass through the cell membrane of their target cells, are called lipophilic hormones. II. Precursors of active hormones may be classified as either prohormones or prehormones. A. Prohormones are relatively inactive precursor molecules made in the endocrine cells.