What body function is aided by vitamin K?

What body function is aided by vitamin K?

• A. Blood coagulation
• B. Vision
• C. Digestion
• D. Circulation

Answer: (A)

Vitamin K is essential for blood coagulation. It activates several liver-made clotting factors (II, VII, IX, and X) through a process called gamma-carboxylation, which enables these proteins to bind calcium and participate effectively in the clotting cascade that stops bleeding. Without enough vitamin K, clot formation is impaired, leading to a tendency to bleed or bruise easily. The other options don’t reflect vitamin K’s primary role: vision involves vitamin A, digestion involves multiple factors but not this vitamin specifically, and circulation is a broad function not tied to a single vitamin’s main action. Vitamin K is a fat-soluble vitamin found in leafy greens and some oils.

Vitamin K is essential for blood coagulation. It activates several liver-made clotting factors (II, VII, IX, and X) through a process called gamma-carboxylation, which enables these proteins to bind calcium and participate effectively in the clotting cascade that stops bleeding. Without enough vitamin K, clot formation is impaired, leading to a tendency to bleed or bruise easily. The other options don’t reflect vitamin K’s primary role: vision involves vitamin A, digestion involves multiple factors but not this vitamin specifically, and circulation is a broad function not tied to a single vitamin’s main action. Vitamin K is a fat-soluble vitamin found in leafy greens and some oils.