1) Enterohepatic circulation consists of:

a. toxins are recirculated in the liver with increased toxicity

b. released xenobiotics are reabsorbed and transported back to liver

c. non-polar xenobiotic conjugates are released into the intestine via the bile duct

d. the portal vein is connected to the aorta through the liver

b.

Explanation:

The correct answer is

b. released xenobiotics are reabsorbed and transported back to liver

Explanation

In Enterohepatic Circulation following occurs,

After detoxification in the liver, the polar xenobiotics are secreted into the bile, which are then hydrolyzed in the intestine. The released xenobiotics are again reabsorbed back into the portal circulation, this is known as entero-hepatic recycling.