16. The Gl organ that is the major site of nutrient absorption is the A) esophag
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16. The Gl organ that is the major site of nutrient absorption is the A) esophagus B) stomach C) small intestine D) large intestine 17. This enzyme, which digests carbohydrates, is found in saliva and in the small intestine A) amylase B) pepsin C) lipase D) trypsin 18. This accessory organ of the digestive system makes digestive enzymes that act upon all of the major food types A) salivary glands B) liver C) gall bladder D) pancreas 19. The digestive function of the liver is to A) aid in the control of blood ghucose levels B) remove pathogens from the blood C) produce bile D) neutralize toxic chemicals 20. Pancreatic enzymes digest all types of fluids after they are secreted into the: A) Mouth B) Stomach C) Duodenum D) Jejunum E) lleum 21. Digestion refers to the A) progressive dehydration of indigestible residue. B) input of food into the digestive tract C) release of substances into the lumen of the gut. D) absorption of nutrients in the gut. E) breakdown of food into particles small enough to cross epithelial cells 22. The first nutrient to be chemically digested is: A) starch B) protein C) fatExplanation / Answer
16.C .the nutrients are absorbed in the small intestines of GI tract.
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17.A.Amylase
Saliva contains SALIVERY amylase or tyalin which digests starch into sugar.Amylase is also secreted by pancreas called as pancreatic amylase secreted into small intestines.
18.D.pancreas .pancreatic juice contains many enzymes like amylase , lipase and peptidases.
19.C.The digestive function of liver is to produce bile which is helpful in emulsification of fats.
20.C. Duodenum. Pancreatic juice is secreted into the inner lumen duodenum of small intestines.
21.E.digestion refers to break down of complex food into simpler form which is small enough to cross epithelial cells.
22.A.starch.starch is the ist nutrient chemically digested in the mouth by salivery amylase or tyalin. Starch is converted into sugar .30% of starch is converted into sugar .
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