Question

ion 48 (0.5 points)
what has to happen to bilirubin in the liver in order for it to be secreted into the digestive tract as bile?
a) bilirubin is oxidized into bile acids.
b) bilirubin is converted into cholesterol.
c) bilirubin is bound to albumin and secreted directly into bile.
d) bilirubin is conjugated (with glucuronic acid).

Explanation:

To determine the correct answer, we analyze each option:

• Oxidizing bilirubin into bile acids is incorrect (bile acids come from cholesterol metabolism).
• Converting bilirubin to cholesterol is wrong (bilirubin and cholesterol have different metabolic paths).
• Bilirubin bound to albumin is for transport to the liver, not direct secretion into bile.
• In the liver, bilirubin undergoes conjugation with glucuronic acid to become water - soluble, enabling its secretion into bile. So the correct option is the one stating "Bilirubin is conjugated (with glucuronic acid)".

Answer:

D. Bilirubin is conjugated (with glucuronic acid). (assuming the option with "Bilirubin is conjugated (with glucuronic acid)" is labeled D; if the original labeling was different, adjust the identifier accordingly based on the actual option numbering in the question)