Vitamin K is essential for which physiological process?

Vitamin K is essential for which physiological process?

• A. Blood clotting
• B. Vision
• C. Nerve conduction
• D. Bone remodeling

Answer: (A)

Vitamin K enables blood clotting by activating several clotting factors in the liver through a process called gamma-carboxylation. This modification allows these factors to bind calcium and attach to phospholipid surfaces on platelets, which is essential for the coagulation cascade to form a stable clot. Without enough vitamin K, these clotting factors can’t function properly, leading to a tendency to bleed. While vitamin K does play a role in bone proteins as well, the key process it directly enables is blood coagulation.

Vitamin K enables blood clotting by activating several clotting factors in the liver through a process called gamma-carboxylation. This modification allows these factors to bind calcium and attach to phospholipid surfaces on platelets, which is essential for the coagulation cascade to form a stable clot. Without enough vitamin K, these clotting factors can’t function properly, leading to a tendency to bleed. While vitamin K does play a role in bone proteins as well, the key process it directly enables is blood coagulation.