Vitamin K Flashcards
three souces of vitamin K
phylloquinone (K1)
menaquinone (K2)
menadione (K3)
Phylloquinone (K1) is synthesized from
plants
menaquinone (K2) is synthesized from
animal sources
menadione (K3) is synthesized from
synthetic
vitamin k is destroyed by
light and heat
Vitamin K is ______ and requires bile for micelle formation
fat soluble
absorption of vitmain K is enhanced by the presence of
fat
bile salts
pancreatic juices
phylloquinone (K1) is absorbe in the
small intestine (jejun)
menaquinons are synthesized by bacteria in the_____ and absorbed by_____
lower digestive tract
passive diffusion
phylloquinone or menaquinone is absorbed better
menaquinone
vitamin k is incorporated into____ for transport across tissues
chylomicron
once vitamin k is incorporated into chylomicron, its is delivered to:
liver
Vitamin K can be incorporated into ____ for transport to extra hepatic tissue
VLDL
vitamin k is primarily stored in the
liver
the primary function of vitamin k is to :
serve as the cofactor for a carboxylase enzyme that catalyzes the g-carboxylation of glutamic acid (Glu) residues on specific proteins