Human Physiology
15th Edition
ISBN: 9781259864629
Author: Fox, Stuart Ira
Publisher: Mcgraw-hill Education,
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Textbook Question
Chapter 18, Problem 15RA
Which of these statements about contraction of intestinal smooth muscle is true?
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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.
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Chapter 18 Solutions
Human Physiology
Ch. 18 - Prob. 1aCPCh. 18 - Describe the structure and function of the mucosa,...Ch. 18 - Prob. 2bCPCh. 18 - Describe the structure and function of the lower...Ch. 18 - Prob. 3bCPCh. 18 - Prob. 4aCPCh. 18 - Explain how peptic ulcers are produced and why...Ch. 18 - Explain how gastrin and vagus nerve stimulation...Ch. 18 - Describe the adaptations of the small intestine...Ch. 18 - Prob. 6CP
Ch. 18 - Prob. 7CPCh. 18 - Prob. 8aCPCh. 18 - Prob. 8bCPCh. 18 - Prob. 9CPCh. 18 - Prob. 10aCPCh. 18 - Prob. 10bCPCh. 18 - Prob. 10cCPCh. 18 - Prob. 11aCPCh. 18 - Prob. 11bCPCh. 18 - Prob. 12CPCh. 18 - Prob. 13aCPCh. 18 - Describe the mechanisms involved in the intestinal...Ch. 18 - Prob. 14CPCh. 18 - Prob. 15CPCh. 18 - Prob. 16aCPCh. 18 - List each enzyme involved in protein digestion....Ch. 18 - Describe how bile aids both the digestion and...Ch. 18 - Trace the pathway and fate of a molecule of...Ch. 18 - Prob. 17cCPCh. 18 - Which of these statements about intrinsic factor...Ch. 18 - Prob. 2RACh. 18 - Which of these statements about gastric secretion...Ch. 18 - Prob. 4RACh. 18 - Which of these statements about trypsin is...Ch. 18 - Prob. 6RACh. 18 - Prob. 7RACh. 18 - The first organ to receive the blood-borne...Ch. 18 - Prob. 9RACh. 18 - Prob. 10RACh. 18 - Prob. 11RACh. 18 - Which of these statements about vitamin is...Ch. 18 - Which of these statements about starch digestion...Ch. 18 - Prob. 14RACh. 18 - Which of these statements about contraction of...Ch. 18 - Prob. 16RACh. 18 - Prob. 17RACh. 18 - Which of the following statements about the liver...Ch. 18 - Prob. 19RACh. 18 - Prob. 20RACh. 18 - Prob. 21RACh. 18 - Describe the mechanisms that are believed to...Ch. 18 - Prob. 23RACh. 18 - Explain how jaundice is produced when (a) the...Ch. 18 - Prob. 25RACh. 18 - Distinguish between chylomicrons, very-low-density...Ch. 18 - Prob. 27RACh. 18 - Trace the course of blood flow through the liver...Ch. 18 - Prob. 29RACh. 18 - Describe the reflexes controlling the stomach,...Ch. 18 - Prob. 31RACh. 18 - Prob. 32RACh. 18 - Prob. 33RACh. 18 - Prob. 34RACh. 18 - Prob. 35RACh. 18 - Prob. 36RACh. 18 - Prob. 37RACh. 18 - Prob. 38RACh. 18 - Prob. 39RACh. 18 - Prob. 40RACh. 18 - Refer to figure 18. I 4 to answer the following...Ch. 18 - Prob. 42RACh. 18 - Prob. 43RA
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- Which of the following statements about contraction of intestinal smooth muscle is TRUE?A. It occurs automatically.B. It is increased by parasympathetic nerve stimulationC. It produces segmentationD. All of the above are TRUEarrow_forwardWhich of the following statements regarding constipation is TRUE?A. Constipation is defined as having less than one bowel movement per day.B. Hyperthyroidism can contribute to constipation by slowing intestinal motility.C. Constipation occurs when waste remains in the intestines too long and/or too much water is reabsorbed from the feces.D. Sedentary lifestyle, stress & anxiety, or improper bowel habits (e.g. not heedingthe ‘call to defecate’) are all frequent causes of constipation that can be treated.E. Regardless of the cause of constipation, increasing the amount of fibre in the dietcan eliminate constipation by helping to retain more water in the stool.arrow_forwardWhich of the following is an unregulated process in the digestive tract? a. secretion of cholecystokinin (CCK) by the duodenal mucosa b. absorption of amino acids across the epithelium of the small intestine c. release of bicarbonate ion (HCO3–) by pancreatic duct cells d. peristalsis in the stomacharrow_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_forwardWhich of these structures increase the mucosal surface of the smallintestine?a. circular folds d. length of the small intestineb. villi e. All of these are correct.c. microvilliarrow_forwardWhich of the following structures is more likely found in the duodenum only a. parietal cells cells b d B d. pepsin b. Brunner's glands e. (a, b) c. panetharrow_forward
- Brunner's glands secrete an alkaline product that helps achieve optimal pH for the activity of pancreatic enzymes. Where are these glands located? A. At the base of villi throughout the small intestine B. In the epithelium of the ampulla of Vater C. In the mucosa and submucosa of the jejunum D. In the submucosa of the duodenum E. In the submucosa of the ileumarrow_forwardWhich of these statements about bile is true?a. About 500 mL is secreted daily.b. Its main function is the denaturation of proteins.c. It is synthesized in the gallbladder.d. Bile salts are recycled.arrow_forwardCells of the liver that do away with any foreign material from the blood and are specialized phagocytic cells are called? A. Hepatic B. Kupffers C. Liver D. Lymph The folds of mucous membrane in the stomach are called: A. Fundus B. Pylorus C. Palate D. Rugaearrow_forward
- Sympathetic innervation of the GI tract is responsible fora. closing the pyloric sphincter.b. stimulating peristalsis.c. stimulating secretion of the pancreatic acinar cells.d. vasodilating the major digestive system blood vessels.arrow_forwardThis process ensures that all contents of the small intestine come in contact with villi. A. Propulsion B. Peristalsis C. Segmentation D. Digestionarrow_forwardThere are two different kinds of secretions associated with the digestive system that needs to be understood to avoid confusion when describing how the digestive system functions. Which one of these secretions will be involved in the control of digestion through the blood? A.Endocrine B.Exocrinearrow_forward
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Human digestive system - How it works! (Animation); Author: Thomas Schwenke;https://www.youtube.com/watch?v=X3TAROotFfM;License: Standard Youtube License