Biological Science (6th Edition)
6th Edition
ISBN: 9780321976499
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Emily Taylor, Greg Podgorski, Jeff Carmichael
Publisher: PEARSON
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Chapter 41, Problem 12PIAT
Summary Introduction
Introduction:
The digestive tract is described as the series of organs that work together as the food passes in the process of digestion. The nutrients are absorbed and the left over after this is referred to as waste, which is eliminated after the process.
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All of the following are layers of the vertebrate gastrointestinal tract excepta. the peristalsis.b. the submucosa.c. the mucosa.d. the muscularis
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.
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- Which of the following statements is true?a. Intracellular digestion commonly occurs in vertebrates.b. Absorption of nutrients always requires active transport.c. Alimentary canals have two openings, whereas gastrovascularcavities have only one.d. Extracellular, but not intracellular, digestion requires hydrolyticenzymes.e. Most minerals are absorbed by simple diffusion.arrow_forwardOption E is wrong, please give correct answerarrow_forwardWhich of the following is true about segmentation in the small intestine?a. It is a type of peristalsis.b. It moves chyme only from the duodenum to the ileum.c. Its frequency is the same in each intestinal segment.d. It is unaffected by cephalic phase stimuli.e. It produces a slow migration of chyme to the large intestine.arrow_forward
- It is occasionally necessary for a person to have their gallbladder surgically removed. How will such a person's digestive process be altered? A. Pepsinogen would not be converted into pepsin before entering the lumen of the stomach. B. The person would be unable to digest fats. C. Mucus would not protect the stomach lining. D. Water would not be extracted from forming feces. E. Bile would go directly from the liver to the duodenum.arrow_forwardThe 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_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
- Which of these processes occurs in the mouth? a. ingestion b. mechanical digestion c. chemical digestion d. all of the abovearrow_forward* 4. Which structure does not belong to stomach? A. angular notch B. pyloric antrum C. antrum of stomach D pyloric canal E. fundus of stomacharrow_forwardWhat is true about a gastrovascular cavity? Group of answer choices a. It has generally evolved to have as little surface area as possible b. It is usually found in conjunction with a complete digestive system c. In some species, it plays a role in the animal's movement d. It has two openings, an entrance for food and an exit for waste e. It allows for compartmentalization of digestive functionsarrow_forward
- Which of the following is true? a. The internal anal sphincter is made out of skeletal muscle. b. The defecation reflex can be affected by input from the cerebral cortex. c. Defecation is a complex function that requires coordinated involvement from the gastrointestinal and respiratory system. d. Abdominal muscle contraction decreases intra-abdominal pressure and expel feces more rapidly. e. All of the choices.arrow_forwardWhere does the majority of chemical digestion in thestomach occur?a. fundus and bodyb. cardia and fundusc. body and pylorusd. bodyarrow_forwardA. What is/are the primary role(s) of the large intestine? a. to complete enzymatic digestion and store indigestible material b. to initiate enzymatic digestion of carbohydrates and to store water c. to absorb water from digested material, with essentially no digestive role of its own d. to secrete water into the material that is left over after all available nutrients have been absorbed e. to digest fats A. In the intestine most nutrients are absorbed regardless of whether the body has an immediate need or shortfall of them; ie there is little control over amounts taken up – which of the following does not follow this rule? a. absorption of sodium b. absorption of water c.absorption of iron d. absorption of fat soluble vitamins e. none of the above follow this rule – close control is exerted over all of themarrow_forward
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