Question

Choose the incorrect statement w.r.t. humans.

1. Hepatic portal vein carries nutrient rich blood

2. Hepatic artery carries oxygen rich blood

3. Hepatic vein carries urea rich blood

4. Renal vein carries urea and ammonia rich blood​

Answer 1

Answer:

1.ans. The portal vein supplies approximately 75 percent of blood flow to the liver. The portal vein is not a true vein, which means it does not drain into the heart. Instead, it brings nutrient-rich blood to the liver from the gastrointestinal tract and spleen.

2.ans. The liver receives a blood supply from two sources. The first is the hepatic artery which delivers oxygenated blood from the general circulation. The second is the hepatic portal vein delivering deoxygenated blood from the small intestine containing nutrients.

3.ans. The liver is functional in breaking down excess amino acids into urea. Therefore, the liver has the highest concentration of urea as it is the primary site for urea production. From the liver, the hepatic veins carry oxygen-depleted blood to the inferior vena cava.

4.ans. It is the Hepatic vein. Kidneys excrete urea, hence the blood vessels that exit from the kidneys have the least concentration of urea and other nitrogenous wastes. ... From the liver, the hepatic veins carry oxygen-depleted blood to the inferior vena cava.