final on iodine

Question 1

body normally has how many mg?
% located where?
rest?

Answer 1

20-30 mg
75% in thyroid gland
rest in mammary gland, gastric mucosa and blood

Question 2

function?

Answer 2

thyroid hormone synthesis
T4 = thyroxine
T3 = triiodothyronine

Question 3

two deficiencies?

Answer 3

goiter & cretinism

Question 4

goiter deficiency?

Answer 4

enlargement of thyroid gland
mostly in women
other causes
= goitrogens (block iodine absorption)
= cabbage and peanuts and broccoli
= selenium deficiency (needed for T3 & T4)

Question 5

2 goiter complications?

Answer 5

usually asymptomatic
Dysphagia
= trouble swallowing
= big throat looking
Dyspnea
= trouble breathing
= cooked esophagus

Question 6

cretinism deficiency?

causes?

Answer 6

severe iodine deficiency during pregnancy
causes
= fetal death
= protuberant abdomen
= irreversaible retardation

Question 7

food sources

Answer 7

seaweed and fish
processed foods
iodized salts

Question 8

iodine excess and toxicity?

Answer 8

can tolerate high intakes
repletion must be done slowly to prevent hyperthyroidism
paradoxical goiter
enlarged thyroid
mostly in japan and china