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Metabolism > Vitamins > Flashcards

Vitamins Flashcards

1
Q

What are vitamins?

A

organic compounds with essential biochemical functions that are not made by the body

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2
Q

Name the water soluble vitamins

A

thiamin, riboflavin, niacin, vitamin B6, pantothenic acid, biotin, folate, vitamin B12, vitamin C

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3
Q

Name the fat soluble vitamins

A

A, D, E and K

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4
Q

Why isnt vitamin K necessary in the diet?

A

because it is made by bacteria in the gut

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5
Q

Which vitamin is depleted most rapidly in starvation?

A

thiamin

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6
Q

What is beriberi?

A

a deficiency in thiamin due to diet - results in weakness, paralysis, anaemia and wasting and pitting oedema

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7
Q

What is the biological role of thiamin?

A

coenzyme in carboxylations, involved in fat, protein and carbohydrate metabolism, involved in nerve function

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8
Q

What is wernicke-korsakoff syndrome?

A

alcoholism with an underlying thiamin deficiency - symptoms are nystagmus, wide step, confusion, hypothermia, amnesia and confabulation

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9
Q

What is the biological role of riboflavin?

A

electron carrier and involved in carbohydrate, protein and fat metabolism

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10
Q

What is a magenta coloured tongue a sign of?

A

riboflavin deficiency

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11
Q

What is the biological role of niacin?

A

coenzyme, electron carrier, involved in carbohydrate, protein and fat metabolism

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12
Q

What is the biological role of vitamin B6?

A

amino acid metabolism

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13
Q

What people have deficiencies in biotin?

A

people who eat a large amount of raw eggs

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14
Q

What are the symptoms of a biotin deficiency?

A

shiny dry and scaly hands

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15
Q

What are the symptoms of a folate deficiency?

A

macrocytic anaemia, glossitis, spina bifida

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16
Q

What is the biological role of vitamin B12?

A

folate metabolism, transalkylations

17
Q

Who is at risk of vitamin B12 deficiencies?

A

vegans

18
Q

What are the symptoms of vitamin B12 deficiencies?

A

pale yellow skin, light coloured irises, grey hair, tingly skin

19
Q

What is the biological role of vitamin C?

A

cofactor in collagen synthesis, neurotransmitter metabolism, iron absorption, antioxidant

20
Q

What is a deficiency of vitamin C?

A

scurvy

21
Q

What is vitamin A important for?

A

night vision and epithelium growth

22
Q

What is vitamin D important for?

A

calcium regulation and bone development

23
Q

What are the symptoms of vitamin D deficiency?

A

rickets in the young and osteomalacia in adults

24
Q

What is vitamin K important for?

A

blood clotting

Metabolism (16 decks)

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