What is Life? A Guide to Biology with Physiology
3rd Edition
ISBN: 9781464157745
Author: Jay Phelan
Publisher: W. H. Freeman
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Chapter 22, Problem 10MC
Summary Introduction
Introduction:
The four stages of nutrient extraction are ingestion, digestion, absorption and elimination.
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Which 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 stomach
There 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.Exocrine
The region of the digestive tract most responsible for absorption of nutrients is the: a. stomach b. small intestine c. large intestine d. liver
Chapter 22 Solutions
What is Life? A Guide to Biology with Physiology
Ch. 22 - Prob. 1SACh. 22 - Prob. 2SACh. 22 - Prob. 3SACh. 22 - Prob. 4SACh. 22 - Prob. 5SACh. 22 - Prob. 6SACh. 22 - Prob. 7SACh. 22 - Prob. 8SACh. 22 - Prob. 9SACh. 22 - Prob. 10SA
Ch. 22 - Prob. 11SACh. 22 - Prob. 12SACh. 22 - Prob. 13SACh. 22 - Prob. 14SACh. 22 - Prob. 15SACh. 22 - Prob. 16SACh. 22 - Prob. 1MCCh. 22 - Prob. 2MCCh. 22 - Prob. 3MCCh. 22 - Prob. 4MCCh. 22 - Prob. 5MCCh. 22 - Prob. 6MCCh. 22 - Prob. 7MCCh. 22 - Prob. 8MCCh. 22 - Prob. 9MCCh. 22 - Prob. 10MCCh. 22 - Prob. 11MCCh. 22 - Prob. 12MCCh. 22 - Prob. 13MCCh. 22 - Prob. 14MCCh. 22 - Prob. 15MC
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- The bile from the liver is delivered to the _______. a. stomach b. liver c. small intestine d. colonarrow_forwardBile has a role in _________ digestion and absorption. a. carbohydrate c. protein b. fat d. amino acidarrow_forwardExplain the differences between the digestion roles of the small and large intestines. Does the appendix also have a digestive function?arrow_forward
- Figure 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_forwardMatch the digestive organ with the correct function 1)Mouth 2)Esophagus 3)Stomach 4)Pancreas 5)Liver 6)Gallbladder 7)Small intestines 8)Large Intestines A. Absorption of water B. Secretes digestive enzymes C. Stores food before it enters the intestines D. Absorption of nutrients E. Moves food into the stomach F. Begins mechanical digestion and chemical digestion of food G. Produces bile H. Stores bilearrow_forwardWhich 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 usearrow_forward
- Which of these processes occurs in the mouth? a. ingestion b. mechanical digestion c. chemical digestion d. all of the abovearrow_forwardWhich 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.arrow_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
- Which of the following function below is not performed by the liver? a. deamination of amino acids to form keto acids b. production of glucagon c. conversion of non-carbohydrate molecules to glucose d. synthesis of lipoproteins to transport fatty acidsarrow_forwardAll of the following statements regarding the liver are true except one, which one? a. it can convert amino acids to glucose during periods of fasting b. it contains special phagocytic cells which remove worn-out blood cells from the circulation c. blood from the hepatic artery and portal vein travels away from the central vein of each lobule d. it converts ammonia to ureaarrow_forwardIt 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_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