Question

Which metal among the following is present in human blood?
A.Titanium
B.Mercury
C.Gold
D.Iron

Answer 1

Hint: For a metal to be present in the human blood, it must pass two basic tests of criteria. The first criteria is that the metal should have some function and should contribute to the processes in the blood. And the second criteria is that it must bio – compatible.

Complete step by step solution:
Before we move towards the solution of this question, let us first understand the interaction of these metals with the human body.
Titanium: Titanium is a bio – compatible metal, which means that it does not harm the human body or be of toxic nature when interacting with a human body. It has very less to negligible corrosion because of the body fluids. But there is no specific need for titanium for the functioning of the human body. It is generally used as a support frame for healing broken bones.
Mercury: Mercury in general is very toxic to the human body. By mere exposure to mercury vapours, adverse or lethal effects can be observed in digestive, nervous and even the immune systems. Hence, this metal is just not compatible with the human body.
Gold: Gold is one of the few metals that is non – corrosive to the body fluids of a human. This non – corrosive nature of gold has made it possible to use the metal in dental prostheses as well as surgical instruments. Gold, in moderate quantities also helps in blood circulation. But there is no direct source of producing gold within the human body.
Iron: iron is one of the metals that can get easily oxidized. This property of iron is useful for transferring oxygen from the blood throughout the body. The human blood contains a component known as haemoglobin, which is made of iron, that helps in carrying oxygen in the blood.
Hence, iron is the metal which is present in the human blood

Hence, Option D is the correct option.

Note:
About 70 percent of your body's iron is found in the red blood cells of your blood called haemoglobin and in muscle cells called myoglobin. Haemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues.