51. All food that consumed has to pass through the : 1400667.
51. All food that is consumed has to pass through the liver before complete absorption can occur.
52. The absorption of fat-soluble vitamins does not require the action of bile.
53. Intrinsic factor is a type of vitamin produced by bacteria in the large intestine.
54. Bicarbonate ions produced by the salivary glands and pancreas are important because they neutralize and provide a favorable pH for enzyme action.
55. Cells that line the intestine live for only a few days before they get sloughed off and discarded.
56. The active transport mechanism of absorption requires energy but does not require a carrier molecule.
57. Digestion is regulated by hormones secreted by the GI tract.
58. Hunger and satiety are controlled by the nervous system.
59. Peptide YY is a hormone that signals hunger and ghrelin is one that signals fullness.
60. Both water-soluble and fat-soluble nutrients are transported via the same system from the small intestine.