Bile

Question 1

Bile

Answer 1

Composed of bile salts( bile acids conjugated to glycine or taurine, making them water soluble), phospholipid, cholesterol, bilirubin, water and ions.

Cholesterol 7alpha-hydroxylase catalyzes RLS.

Question 2

Bile function

Answer 2

Digestion, absorption of lipid and fat soluble vitamins
Cholesterol excretion (body's only mean of eliminating cholesterol)
Antimitochondrial activity (via membrane disruption)

Question 3

Bilirubin

Answer 3

Product of heme metabolism:
Bilirubin is removed from blood by liver, conjugated with glucuronate and excreted in bile

Direct: conjugated and water soluble
Indirect: unconjugated and water insoluble

Question 4

Urobiligen

Answer 4

In urine, gives its color.

Question 5

Urobilinogen

Answer 5

Excreted in feces as stercobilin,

gives its characteristic color of stool.