Biological Role
Chlorine plays a major biological role in most higher animal life as acqueous choride anions, as part of the electrolyte makeup of inter- and intra-cellular fluids. It has been noted that the ionic strength and composition of these fluids is often similar to sea water. In humans, chloride is most commonly obtained in the diet from table salt. Excess salt intake can have health implications. Iodine are needed by our bodies in trace amounts, particularly by the thyroid gland. Its definiciency can cause goitre. The other three halogens have no known biological role.
Read more about this topic: Halogen
Famous quotes containing the words biological and/or role:
“Much of the ill-tempered railing against women that has characterized the popular writing of the last two years is a half-hearted attempt to find a way back to a more balanced relationship between our biological selves and the world we have built. So women are scolded both for being mothers and for not being mothers, for wanting to eat their cake and have it too, and for not wanting to eat their cake and have it too.”
—Margaret Mead (1901–1978)
“Whatever we’re doing, whoever we are, it isn’t enough. . . . Little wonder we have trouble finding role models to guide us through these shoals. No one less than God Herself could be all the things we’d like to be to all the people we’d like to feel approval from.”
—Melinda M. Marshall (20th century)