Question

The function of vitamin K is in
A. Regulation of calcium and phosphorus metabolism
B. Blood clotting
C. Respiration
D. Carbohydrate metabolism.

Answer 1

Hint: Vitamin K is a fat-soluble vitamin which is mainly metabolized in the liver. It has several important functions in the blood in our body. The deficiency of this vitamin causes several diseases.

Complete answer:The vitamins are mainly obtained from plants. There are several dietary sources of vitamins. Our body gets vitamin A mainly from leafy vegetables. Vitamin C is abundant in fruits like lemon and oranges. Vitamin K, this fat-soluble vitamin mainly from green leafy vegetables. But, the fact that they are also obtained from certain bacterias living inside our gut. Vitamin K is mainly metabolized in the liver. The liver is the largest gland in the human body. Vitamin K has important roles to play in blood clotting. Several clotting factors need vitamin K for their synthesis. Also, it is needed for the production of several proteins like protein S and protein C. The deficiency of vitamin K causes serious malfunctioning of the clotting mechanism of our body. Deficiency may be due to a decreased amount of vitamin K in the diet or due to decreased absorption from the gut. The use of certain drugs may destroy the normal bacterial flora of our body that produces essential vitamins and leads to a deficiency. Other than vitamin K, calcium also helps in the clotting process of our blood. Their deficiency may lead to increased time for blood coagulation which is seen in several patients.
Hence, the correct option is B

Note: Haemophilia is a sex-linked recessive disorder that occurs due to a recessive mutation of an X linked gene. This disease is characterized by continuous and severe bleeding even from minor injuries. There are two types of this disease. They are haemophilia A and B. This disease is similar to the conditions caused by the deficiency of calcium and vitamin K.