Excretion in Mammals (Liver)

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1. Why does blood from the hepatic artery and hepatic portal vein mix in the sinusoids?

  • To increase the oxygen content of the blood from the hepatic portal vein, providing hepatocytes with plenty of oxygen.
  • To make the system more efficient.
  • To reduce the oxygen content of the blood from the hepatic portal vein, stopping the hepatocytes from getting oxygen.
  • To clean the blood.
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2. How is oxygenated blood delivered to the liver?

  • Hepatic portal vein
  • Hepatic artery
  • Portal vein
  • Hepatic vein

3. Which is NOT a main metabolic waste of mammals?

  • Bile pigments
  • Nitrogenous waste (urea)
  • Salt
  • Carbon dioxide

4. Briefly, what is carbohydrate metabolism?

  • Reducing the digestion and metabolism of carbohydrates.
  • Hepatocytes convert glucose to glycogen, which is stored in the liver and restored to glucose when needed.
  • Increasing the digestion and metbolism of carbohydrates.
  • Using carbohydrates to increase overall metabolism and assist the liver.

5. How is oxygenated blood removed from the liver/ returned to the heart?

  • Hepatic vein
  • Hepatic artery
  • Portal vein
  • Hepatic portal vein

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