Vitamin K Flashcards

1
Q

Anti-hemorrhagic vitamin

A

Vitamin K

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2
Q

Vitamin K that is synthesized by green plants ; converted to K2

A

Phylloquinones (K1 series)

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3
Q

Vitamin K that is synthesized by the intestinal bacteria

A

Menaquinones (K2 series

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4
Q

Vitamin K that is twice as potent; metabolized more rapidly

A

Menadione (synthetic)

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5
Q

SOURCES OF VITAMIN K

A

High amounts in green leafy vegetables (broccoli, cabbage, turnip greens and dark lettuces)

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6
Q

Poor source of Vitamin K

A

Low in breastmilk

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7
Q

antagonizes the role of vitamin K

A

Anticoagulant drugs

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8
Q

Reduce vitamin K synthesis

A

Sulfa drugs and antibiotic

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9
Q

May destroy vitamin K

A

Light, oxidizing agents, acids, and alkalis

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10
Q

Is Vitamin K is heat-stable?

True or false

A

TRUE

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11
Q

Functions of Vitamin K

A
  1. Essential for the synthesis of several proteins involved in blood clotting
  2. Needed for the synthesis of proteins involved in regulating bone growth and cell growth
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12
Q

requires vit K for its maturation

A

Osteocalcin

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13
Q

is vitamin K easily destroyed by light?

True or false?

A

TRUE

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14
Q

Rare Vitamin K Deficiency

A

lipid malabsorption,
chronic antibiotic therapy
liver disease

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15
Q

Vitamin K Deficiency in newborn due to hypoprothrombinemia; could lead to fatal anemia

A

hemorrhagic disease

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16
Q

Vitamin K Deficiency in adult

A

delayed blood clotting time, increased incidence of hip fractures in older adults

17
Q

Vitamin K Toxicity

A

Menadione: hemolytic anemia in rats and severe jaundice in infants