antihemorrhagic factor
Definition
Noun: A fat-soluble vitamin that is essential for the synthesis of proteins required for normal blood clotting. Its deficiency can lead to excessive bleeding.
Usage
The term "antihemorrhagic factor" is a technical or scientific name for this specific vitamin. It is used primarily in medical, nutritional, and biochemical contexts to describe the substance's primary physiological function.
Examples
- A deficiency of the antihemorrhagic factor can result in a bleeding disorder.
- The liver requires this antihemorrhagic factor to produce functional clotting factors.
- Newborns are often given a supplement of the antihemorrhagic factor to prevent hemorrhagic disease.
Advanced Usage
- Biochemical Role: The antihemorrhagic factor acts as a coenzyme for the enzyme gamma-glutamyl carboxylase, which modifies certain clotting proteins (Factors II, VII, IX, and X) to enable them to bind calcium and function properly.
Variants and Related Words
- Vitamin K: This is the common name for the antihemorrhagic factor. It encompasses several related compounds (e.g., phylloquinone, menaquinone).
- Phylloquinone (Vitamin K1): The form found in green leafy vegetables.
- Menaquinone (Vitamin K2): The form produced by bacteria in the gut and found in some fermented foods.
Synonyms
- Coagulation vitamin
- Prothrombin factor (historically, as it is essential for prothrombin synthesis)
Related Phrases
- Vitamin K-dependent clotting factors: The specific proteins (II, VII, IX, X, Protein C, Protein S) whose synthesis depends on the antihemorrhagic factor.
- Vitamin K antagonist: A substance (e.g., warfarin) that inhibits the action of the antihemorrhagic factor, used as an anticoagulant medication.
Noun
-
a fat-soluble vitamin that helps in the clotting of blood
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