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.
A hormone is a chemical substance of an endocrine gland. Endocrine glands, which are also called ductless glans, deposits the hormones into the blood stream. The blood, on its turn, carries the hormones to every part of the body. The sex hormones are estrogen and testosterone. When neurotransmitters secrete well, information transfers well in the brain.