Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 47, Problem 3TYK

The order of successive steps in digestion is:

a. absorption follows enzymatic hydrolysis.

b. secretion of enzymes follows absorption of digestive material.

c. mechanical processing follows enzyme secretion.

d. mechanical processing follows enzymatic hydrolysis.

e. enzymatic hydrolysis precedes secretion of digestive aids.

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Which of the following statements regarding protein digestion is incorrect? A. The intestinal enzymes trypsin and chymotrypsin continue the chemical breakdown of polypeptides into oligopeptides. B. Chemical digestion of proteins is initiated in the stomach through the action of the enzyme pepsin. C. Mechanical digestion of proteins starts in the mouth through chewing. D. Di- and tripeptides enter the intestinal cells where they are broken down by peptidases into individual amino acids.
Which of the following is true about carbohydrate digestion? A. Cellulose and lignin found in plants are totally indigestible even with intestinal bacteria. B. The acidity of the stomach prevents chemical digestion of carbohydrates. C. Dextrin and maltose are the products of chemical digestion of starch by pancreatic amylase. D. Disaccharidases produced from the pancreas breaks down oligosaccharides in the intestines.
Which of the following is true regarding digestion?   A. The first segment of the alimentary tract is the duodenum.   B. Amylase hydrolyzes starches into simple sugars.   C. Bile hydrolyzes amylase into simple sugars.   D. Trypsin and chymotrypsin degrade lipids into free fatty acids.   E. All of the above answer choices correctly answer the question.
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