Fat soluble vitamins and health - Vitamin K

20 important questions on Fat soluble vitamins and health - Vitamin K

What are the main forms of vitamin K?

K1: phylloquinone
K2: menaquinone

How is vitamin K absorbed?

It is absorbed in the middle and last part of the small intestine.
Absorption depends on the presence of bile and pancreatic juices and it is enhanced by dietary fat.

Where is it vitamin K found?

Liver, bown and heart.
  • Higher grades + faster learning
  • Never study anything twice
  • 100% sure, 100% understanding
Discover Study Smart

How much vitamin K is there in the body and what is the turnover?

Relatively small amount of vitamin K is present in the body and there is a fast turnover.

What is the vitamin K cycle?

The body recycles vitamin K so it may be re-used many times.

What does vitamin K doe with certain proteins and how are these proteins called?

It helps with the formation of a range of biologically active proteins. They are called vitamin K dependent proteins.

What is carboxylation and what does vitamin K do with it?

Vitamin K participates in the conversion of glutamete residues of the proteins to gamma-carbxy-glutamate residues by addition of a carboxyl-group.

What can the protein do after carboxylation?

It is converted to glutamate and now it is able to bind to calcium.

What are the proteins affected by vitamin K important to?

Blood coagulation and bone strength

What are pro-thrombin and fibrinogen?

The 2 proteins that circulate in blood. They are important in blood clotting.

Why is vitamin K imprtant for pro-throbin and fibrinogen?

Trombin accelerates the conversion of fibrinogens to fibrins. It consists of fine threads that tangle together to form a blood clot.

Vitamin K is necessary for the liver to synthesize pro-thrombin. It converts the glutamate in pro-trobin so it can bind to calcium.

Is vitamin K only promoting blood clothing?

No it can also bind to proteins that slow blood clothing down.

What do vitamin D and K do to osteoblast cells?

Vitamin D: The osteoblast cells synthesize osteocalcin under direction of the active form of vitamin D, calcitrion.

Vitamin K is needed to enable ostocalcin to bind minerals to bones. It uses a co enzyme to converter 3 glutamate residues in osteocalcin that enables bone miniralization

What can vitamin K do for old people?

Help to prevent fractures. (prove comes from vitamin K with a green leaf origen so calcium and magnesium present in there could also be responsible)

Who are the people that risk a vitamin K deficiency?

  • Infants
  • people with a gastrointestinal disorder
  • fat malabsorption
  • liver disease
  • after having prelonged antibiotic theroapy coupled wiht compromisng dietary intake
  • Patiens taking anticlotting drugs becasue this is a vitamin K antagonist.

What happens to people with a vitamin K deficiency?

Impaired blood clotting.

What can happens to infants with a vitamin K deficiency

Bleeding within the skull in the first weeks of life. (especially in breast fed children) This is because the concentration of plasma clotting factors are low in infants due to immaturity of the liver.

What are the main sources of vitamin K?

K1: vegetables (esspecialy with green leafs), vegetable oils and some fruits
K2: meat, dairy products,eggs. Natto a fermented food also has it.

What is the form of vitamin K produced by bactiria in the GI track?

menaquinone

What is the AI for vitamin K?

120 mg for man and 80 mg for woman

The question on the page originate from the summary of the following study material:

  • A unique study and practice tool
  • Never study anything twice again
  • Get the grades you hope for
  • 100% sure, 100% understanding
Remember faster, study better. Scientifically proven.
Trustpilot Logo