Biological Role and Precautions
Only manganese has a role in the human body. It is an essential trace nutrient, with the body containing approximately 10 milligrams at any given time, being mainly in the liver and kidneys. Many enzymes contain manganese, making it essential for life, and is also found in chloroplasts. Technetium, Rhenium, and Bohrium have no known biological roles. Technetium is however used in radioimaging.
Read more about this topic: Group 7 Element
Famous quotes containing the words biological, role and/or precautions:
“I am fifty-two years of age. I am a bishop in the Anglican Church, and a few people might be constrained to say that I was reasonably responsible. In the land of my birth I cannot vote, whereas a young person of eighteen can vote. And why? Because he or she possesses that wonderful biological attribute—a white skin.”
—Desmond Tutu (b. 1931)
“I wish glib and indiscriminate critics of industrialists had some conception of the problems that have to be met by factory management.... General condemnation of employers is a favorite indoor sport of the uninformed intelligentsia who assume the role of lance- bearers for labor.”
—Mary Barnett Gilson (1877–?)
“We must take precautions against being prematurely honed sharp—since at the same time we are being prematurely honed thin.”
—Friedrich Nietzsche (1844–1900)