HORMONES
\hˈɔːmə͡ʊnz], \hˈɔːməʊnz], \h_ˈɔː_m_əʊ_n_z]\
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Chemical substances having a specific regulatory effect on the activity of a certain organ or organs. The term was originally applied to substances secreted by various endocrine glands and transported in the bloodstream to the target organs. It is sometimes extended to include those substances that are not produced by the endocrine glands but that have similar effects.
By DataStellar Co., Ltd
By Henderson, I. F.; Henderson, W. D.
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[Greek] Substances normally produced in cells and necessary for the proper functioning of other distant cells to which they are conveyed and of the body as a whole; internal secretions of ductless glands which pass into blood vessels by osmosis; exciting agents, opp. chalones; internal secretions in plants, as auxins, q.v.
By J.H. Kenneth
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Substances which are formed in one tissue of the body but are carried by the blood to some other tissue, upon which they act as chemical stimuli. They form, therefore, chemical messengers by means of which coordination in activity is effected between distant or separate tissues. [Gr.]
By Smith Ely Jelliffe
Word of the day
hydromorphic
- [Greek] Structurally adapted to an aquatic environment, as organs of water plants.