Question

Concentration of carbonic acid does not increase in blood due to presence of
A) $Na^+$
B) $Mg^{2+}$
C) $Ca^{2-}$
D) $K^+$

Answer 1

Hint:Blood is a special connective tissue that circulates in the principal vascular system of human and other vertebrates. It consists of a fluid matrix, plasma and formed elements. They connect different body systems. Blood is slightly alkaline fluid having Ph 7.4. like other connective tissue blood is mesodermal in origin. It transports oxygen and nutrients to all body parts.
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Complete answer:
It is critical to maintain constant blood pH of blood in our body. The buffer that maintains the pH of human blood involves a carbonic acid and bicarbonate ions. In the bloodstream when any acidic substance enters the bicarbonate ions neutralize the hydronium ions forming carbonic acid and water. Carbonic acid is a major component in the buffering system of blood.for prevention of pH of blood from becoming acidic hydronium ion removed from the blood.

When a basic substance enters the bloodstream bicarbonate ions and water are produced by the reaction of carbonic acids and hydroxide ions. Bicarbonate ions are also major components of buffers. hence the hydroxide ions are removed from blood and prevent the pH of blood becoming basic.
Due to the presence of $Na+$ the concentration of carbonic acid does not increase. In the acid- base homeostasis the bicarbonate buffering system of blood is an important buffering system.In plasma the alkaline phosphate combines with carbonic acid and forms sodium bicarbonate.

Hence the correct answer is option ‘A’

Note:It is very typical to maintain the pH of blood because enzymes are very specific in nature and function.If the pH of blood goes out of the range,the enzymes will not work properly and sometimes the enzymes get permanently denatured thus their catalytic activity becomes disabeled. The whole process also affects the biological process of the human body leading to various diseases.