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Biology
Animal Nutrition Quiz 2
Topic 4 Quiz 2
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Category: Animal Nutrition Quiz 2
Which enzyme, substrate and conditions are needed for digestion of food in the stomach?
Gastric juice containing HCl provides an acidic environment for protease to digest proteins in the stomach. Amylase work best in neutral to slightly alkaline conditions in mouth and small intestine.
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As food passes along the alimentary canal, proteins are digested in the
Protein digestion starts in the stomach and carries on in the small intestine. Digestion ends in the small intestine.
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What would happen if a person’s bile duct became blocked?
Bile emulsifies fat to speed up its digestion. If the bile duct is blocked, fat digestion would be affected.
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Which molecules are produced by the digestion of starch and of protein?
Both starch and protein are macromolecules. Starch is a polysaccharide made up of thousands of simple sugar units. Protein are made up of basic units called amino acids.
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Which two organs are connected by the hepatic portal vein?
The hepatic portal vein transports the soluble end products of digestion, eg. glucose and amino acids, from ileum of small intestine to the liver.
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Which of the following is an energy rich carbohydrate stored in large quantities in liver and muscle cells?
Excess glucose are converted to glycogen and stored in liver and muscle cells.
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Which secretion, released into alimentary canal, contains no enzyme but speeds up fat digestion?
Bile is made up of the bile pigment and bile salt. It helps emulsify fats to increase the surface area of fats for faster digestion. Bile is not an enzyme as it does not break down fat into simpler substances.
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Where do chemical digestion and absorption of food occur in the human alimentary canal?
Stomach walls secrete gastric juice which contains hydrochloric acid and enzyme pepsin responsible for the digestion of proteins. The ileum has a folded internal surface covered with numerous villi to increase surface area for absorption of digested food.
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Which secretion does not contain digestive enzymes?
bile contains bile salts and bile pigments that help to emulsify fats. Gastric juice, intestinal juice, and pancreatic juice contains a mixture of digestive enzymes that break down complex food substances to simple, diffusible molecules.
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In which two body organs does the greatest amount of reabsorption of water?
Water is reabsorbed by the small and large intestine. Only option B is correct. Duodenum is a part of the small intestine while colon is part of big intestine.
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Which substances consists of the small soluble molecules and does not have to be digested before it can pass through the wall of the alimentary canal?
Glucose, a monosaccharide, is a simple diffusible molecule. Fats proteins and starch are large complex molecules.
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