Liver

Cards (10)

  • Define excretion
    the removal of metabolic waste products from the body
  • structure of the liver
    Liver:
    A) inferior vena cava
    B) Aorta
    C) Hepatic artery
    D) bile duct
    E) Gall bladder
    F) Hepatic vein
    G) portal vein
  • what is the importance of excretion in homeostasis?

    maintains homeostasis by helping to keep the levels of certain substances in the blood roughly constant.
  • label the diagram of a cross-section of a liver lobule?
    liver lobule:
    A) bile duct
    B) branch of portal vein
    C) branch of hepatic artery
    D) hepatocyte
    E) central vein
    F) sinusoid
    G) canaliculi
  • What is the name of the cells found in the walls of the sinusoid, that break down old erythrocytes and remove bacteria?

    Kupffer cells
  • What is the role of the liver in storing glycogen?

    increase in blood glucose level - after meal
    insulin released by pancreas
    hepatocytes removes glucose from blood
    glucose converts to glycogen
  • what is the role of the liver in detoxification? example?

    it breaks down toxic substances into less harmful ones.
    e.g Alcohol breaks down to ethanal to ethanoate
  • what is the role of the liver in forming urea? steps?

    its a way of getting rid of excess amino acids
    urea is released from the liver into the blood, the kidneys filter the blood, and removed the urea as urine.
  • what are the stages of the ornithine cycle?

    Deamination - removing amine group from amino acid, forms ammonia(toxic).
    Ammonia is converted to less toxic urea.
  • what happens to the carbon skeleton in the amino acid?

    part of respiration for energy
    or converted to lipids as long term energy store