Final answer:
Professor Stopler's claim that hemophiliacs lack vitamin K is false. Hemophilia is a genetic disorder related to a deficiency in one or more clotting factors (VIII, IX or XI), and not to a deficit in vitamin K. Hemophiliacs' treatment generally consists in receiving infusions of the clotting factors they lack.
Step-by-step explanation:
The statement by Prof Stopler stating that hemophiliacs lack vitamin K is false. Hemophilia is a group of genetic disorders causing inadequate production of functional amounts of one or more clotting factors, which leads to an inability for the blood to properly clot. The forms of hemophilia include hemophilia A (factor VIII deficiency), hemophilia B (factor IX deficiency), and the less common hemophilia C (factor XI deficiency). It's important to clarify that this condition is related to these clotting factors and not to a deficiency in vitamin K. Vitamin K is indeed involved in blood clotting as it helps produce four of the required clotting factors (Factors II, VII, IX, and X) in the liver, but its absence doesn't equate to hemophilia. Patients with hemophilia often suffer from bleeding even from minor external and internal wounds, and their treatment typically involves regular infusions of the clotting factors they are deficient in, not vitamin K.