Selenium revision - week 12

Question 1

absorbed

Answer 1

• Bound to methionine and cysteine in food
• Phytates and heavy metals interfere with absorption
• Presence of Vit A, C and E enhance absorption

Question 2

transported

Answer 2

• Bound to transport proteins and dtaken to liver, muscle, kidney and bone
• Selenocystein is biologically active form

Question 3

stored

Answer 3

selenomethoine is storage form in liver, pancreas, muscle, kidney and thyroid

Question 4

excreted

Answer 4

via kidney.urine

Question 5

major function

Answer 5

part of an antioxidant system as glutathione peroxidase, activates thyroid hormones as iodothyronine deiodinase

Question 6

food source

Answer 6

meat, fish, egg, whole grain

Question 7

deficiency

Answer 7

changes/reduction of circulating thyroid hormone and metabolism

Question 8

toxicity

Answer 8

nausea, diarrhea, fatigue