Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 46, Problem 7TY
Summary Introduction
Introduction:
After breaking down the food the next step is to absorb all the nutrients from it. Absorption is carried out in the small intestine where huge amount of Microvilli are present.
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Which of the following best describe the function of goblet cells in the digestive tract?
A.
produce mucus that protects parts of the digestive organs from the effects of powerful enzymes needed for food digestion
B.
secrete buffers in order to keep the pH of the digestive tract close to neutral
C.
provide protection against invading bacteria and other disease-causing organisms that enter the digestive tract in food
D.
absorb nutrients from digested food and store them for future use
Which of the following is True?a. The human stomach maintains a very high pH.b. Gastric glands in the stomach wall secrete pepsinogen. c. Bile is released into the stomach from the liver.d. Many different nutrients are absorbed through the stomach.
The primary function of the large intestine is to concentrate wastes into solid form (feces) for release from the body. How does it accomplish this?
a. By adding additional cells from the mucosal layer
b. By absorbing water
c. By releasing salt
d. All of these are methods used by the large intestine.
Chapter 46 Solutions
Biology
Ch. 46.3 - Smooth, polished stones have been found in the...Ch. 46.3 - Prob. 1CSCh. 46.3 - Prob. 2CCCh. 46.4 - Prob. 1CSCh. 46.5 - Prob. 1CSCh. 46.6 - Prob. 1EQCh. 46.6 - CoreSKILL Did the results support the hypothesis?...Ch. 46.6 - Prob. 3EQCh. 46 - Prob. 1TYCh. 46 - Prob. 2TY
Ch. 46 - Prob. 3TYCh. 46 - Which of the following statements is true? a....Ch. 46 - Prob. 5TYCh. 46 - Which of the following statements regarding the...Ch. 46 - Prob. 7TYCh. 46 - In birds, the secretion of acid and pepsinogen...Ch. 46 - In many vertebrates, bile is produced by the...Ch. 46 - Which of the following istrueof the large...Ch. 46 - Prob. 1CQCh. 46 - Prob. 2CQCh. 46 - Core Concept: Structure and Function Describe the...Ch. 46 - Prob. 1COQCh. 46 - Define nutrient. On the basis of that definition,...
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- a) What is the general function of all enzymes that are involved in the digestive process.b) Use the Table below to summarise the function of 6 named digestive enzymes that are either secreted from specific regions of the gastrointestinal system, or part of the intestinal brush border. Enzyme Site of secretion / Action Function (to include substrate and product formed)arrow_forwardThe small intestine secretes CCK to a) assist in the breakdown of fats b) stimulate release of pancreatin c) increase bile storage d) inhibit gastrin synthesis through negative feedback e) counteract the presence of secretinarrow_forwardFigure 16.7 Which of the following statements about the digestive system is false? a. Chyme is a mixture of food and digestive juices that is produced in the stomach. b. Food enters the large intestine before the small intestine. c. In the small intestine, chyme mixes with bile, which emulsifies fats. d. The stomach is separated from the small intestine by the pyloric sphincter.arrow_forward
- The bile from the liver is delivered to the _______. a. stomach b. liver c. small intestine d. colonarrow_forwardTerrestrial snails perform digestion through the A)incorporation of food into a mucoid mass called a protostyle B)filtration of food by the mantle cavity C)use of a crystalline style for the release of digestive enzymes into a mucoid mass of food D)secretion of digestive enzymes into the forgut followed by absorption of nutrients by the hindgutarrow_forwardThe esophagus differs from the rest of the gastrointestinal tract because it ... a) ... has smooth muscles in the upper part and striated muscles in the lower part. b) ... has villi and microvilli to increase the surface area. c) ... lacks mucosa. d) ... has striated muscles in the upper part and smooth muscles in the lower part. e) ... is not innervated.arrow_forward
- The small intestine is specialized for absorption because it a. is the last section of the digestive tract and retains food the longest. b. has saclike extensions along its length that collect food. c. has no outlet so food remains within it for longer periods of time. d. has an extremely large surface area that allows extended exposure to food.arrow_forwardWhat would be the consequence of eliminating the function of parietal cells in the walls of the stomach? Select one: a. Protein digestion in the small intestine would be eliminated b. Pepsinogen secretion would be eliminated c. It would decrease bile production d. It would eliminate fat digestion in the stomach e. Protein digestion in the stomach would be preventedarrow_forwardWhich of the following is incorrect regarding gastric juice?a. It is provided by the pancreas.b. It contains pepsin to digest protein.c. It has a pH of 2 due to hydrochloric acid.d. It is produced by the gastric glands.arrow_forward
- Why does not the stomach break itself down? a) The stomach wall does not consist of protein so it is not affected by proteolytic enzymes b) The epithelial cells form a protective layer c) The breakdown enzymes are not strong enough to break down the stomach wall d) The stomach wall is protected by mucusarrow_forwardDescribe the three kinds of internal folds or projections that increase surface area in the small intestine. A Villi B.microvilli C.circular folds asaparrow_forwardThe purpose of Microvilli in the human digestive tract is to: a. kill detrimental bacteria in the esophagus b. emulsify fats c. secrete pepsinogen in the stomach d. absorb nutrients from the small intestine into the bloodstream e. secrete trypsinogen and chymotrypsin into the duodenumarrow_forward
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