Several elements are harmful ,are useful for biological systems.
Some of the elements are listed below:-
Chromium:
This is a essential element for human body which is involved in glucose metabolism.Chromium and insulin maintains the correct level of glucose in blood.If it is absent in human body leads to the removal of glucose from the blood lesser than normal level.
Iodine:
Iodine is a essential element for many organisms .It is important incredient of thyroxine. its deficiency leads to goitre (kalalai).Iodine ions are not toxic.
Mercury:
It has no biological function.But it is highly toxic to fungi,plants and animals.
It is present in all living things in the environment.
Every food we eat contains a little mercury.
Manganese:
It is an essential element for all organisms.The manganese enzyme produced in the liver converts nitrogenous waste into urea. It activates several enzymes.Manganese deficiency in soil leads to inhibit the growth of plants and animals .Manganese is essential for plant growth.
Source:( The Principles of Inorganic Chemistry by Puri, Sharma and Kalia)
Some of the elements are listed below:-
Chromium:
This is a essential element for human body which is involved in glucose metabolism.Chromium and insulin maintains the correct level of glucose in blood.If it is absent in human body leads to the removal of glucose from the blood lesser than normal level.
Iodine:
Iodine is a essential element for many organisms .It is important incredient of thyroxine. its deficiency leads to goitre (kalalai).Iodine ions are not toxic.
Mercury:
It has no biological function.But it is highly toxic to fungi,plants and animals.
It is present in all living things in the environment.
Every food we eat contains a little mercury.
Manganese:
It is an essential element for all organisms.The manganese enzyme produced in the liver converts nitrogenous waste into urea. It activates several enzymes.Manganese deficiency in soil leads to inhibit the growth of plants and animals .Manganese is essential for plant growth.
Source:( The Principles of Inorganic Chemistry by Puri, Sharma and Kalia)
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