Selenium

Question 1

How many oxidation state does the Se present ?

Answer 1

3 : selenate (6+), selenite (4+), selenide (2+)

Question 2

Which are the 3 types of Se sources ?

Answer 2

Obligatory accumalor plants
Facultative accumulator plants
Replacement of Se def

Question 3

Which chemical form of Se is the most toxic ?

Answer 3

orga 2x > selenate - selenite > selenide

Question 4

Which are the influ factors in Se poisoning ?

Answer 4

Synergistic compounds, cplx form & health

Question 5

Skin Se absorption is :

Answer 5

Low / Not possible

Question 6

Se is excreted through :

Answer 6

Urine, bile, lungs & milk

Question 7

Which vitamins interfere w/ Se in acute poisoning ?

Answer 7

Vit A & C

Question 8

Which lesions are characteristics of a Se poisoning ?

Answer 8

Hair loss, hoof lesions, lameness & pain
Odor of rotten garlic (H selenide)

Question 9

Spe antidote for Se poisoning ? If yes, which one ?

Answer 9

No spe antidote
Chronic -> arsanilic acid (biliary Se excretion), Methionine & Cu (Se elim)