Question

Which of these elements is present in very little quantity in the body?

• A. $K$
• B. $Ca$
• C. $Mg$
• D. $Cu$

Answer 1

The correct option is D $Cu$

a) Potassium forms an important role in nerve transmission. It helps to maintain the potential gradient inside the body fluid.

b) The permeability of the membrane is controlled and regulated by the calcium channels present in the membrane. It is an ATP dependent channel which mainly regulates the entry and exit of sodium and potassium ions.

c) Magnesium acts as a cofactor for various metabolic reaction like glycolysis.

d) Copper is least abundant element. It forms part of transport proteins present in the inner mitochondrial membrane.

So, the correct answer is option D.