Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 18, Problem 5LTB
Summary Introduction
Introduction:
The human
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Which of the following descriptions is incorrectly matched to the type of digestion occuring?
Acidic pH of gastric juice helping break down proteins and activate enzymes - mechanical digestion
Salivary amylase breaking down starch - chemical digestion
Peristalsis of the small intestine mixing up chyme - mechanical digestion
bile salts helping to emulsify fats and raise the pH - chemical digestion
chewing and mixing of food in the mouth - mechanical digestion
Which of the following digestive processes requires enzymes?
peristalsis
elimination
chemical digestion
mechanical digestion
ingestion
The cephalic phase of digestion:
is an immediate response to stomach distension
begins when someone smells and initially tastes food.
is inhibited by cholecystokinin and secreted from the small intestine
includes the initial steps of chemical protein digestion
All of the above
Chapter 18 Solutions
Biology: Science for Life with Physiology (5th Edition)
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- Figure 34.19 Which of the following statements about digestive processes is true? Amylase, maltaseT and lactase in the mouth digest carbohydrates. Trypsin and lipase in the stomach digest protein. Bile emulsifies lipids in the small intestine. No food is absorbed until the small intestine.arrow_forwardFigure 34.11 Which of the following statements about the digestive system is false? Chyme is a mixture of food and digestive juices that is produced in the stomach. Food enters the large intestine before the small intestine. In the small intestine, chyme mixes with bile, which emulsifies fats. The stomach is separated from the small intestine by the pylloric sphincter.arrow_forwardList the organs and accessory organs of the digestive system. On a separate piece of paper, list the main functions of each organ.arrow_forward
- Digestion is completed and products are absorbed in the _________. a. mouth b. stomach c. small intestine d. large intestinearrow_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_forwardMatch the following processes of the Digestive System to their specific description. Match each item to a choice: Choices: Defecation Digestion Secretion Mixing and propulsion Ingestion Absorption the process by which food material are mixed together and propelled within the GI tract. the process by which micro molecules from the process of digestion are absorbed within the small intestine. the chemical and mechanical process of degrading food material into small particles. the act of taking something (food, medicine, liquid, poison etc.) into the body through the mouth. the process by which undigested food particle are expelled out of the body. the process by which chemical enzymes are secreted by the Digestive System aiding Digestion.arrow_forward
- The cephalic phase of digestion: begins when someone smells and initially tastes food. is inhibited by cholecystokinin and secretin from the small intestin. includes the initial steps of chemical protein digestion. Is an immediate response to stomach distension. all of the above.arrow_forwardWhich of the following statements regarding digestive systems are correct? Glucose monomers are linked together by alpha 1-4 glycosidic bonds in both starch and cellulose. Gastrin is produced by exocrine cells of the gastric glands. Pepsinogen and gastric acid (HCl) are both secreted into the lumen of the stomach.arrow_forwardWhich of the following is NOT a regulatory mechanism for digestion? Only carbohydrates are digested in the oral cavity. Hormones are secreted at various stages of digestion pH of the digestive tract is altered by the release of bicarbonates to the GI tract. Enzyme activation is effected by autocatalysis of zymogens. Cells and different organ systems are involved in the digestion of foodstuffs.arrow_forward
- DIGESTIVE PROCESSES Match each description to a digestive process. involves opening of the anal sphincters COPY & PASTE peristalsis food enters the mouth DEFECATION involves the breakdown of macromolecules by enzymes elimination of PROPULSION chewing indigestible waste MECHANICALI DIGESTION INGESTION alcohol and lipid soluble drugs leave stomach most nutrients enter bloodstream in small intestine swallowing ABSORPTION stomach churning dissolves food into smaller particles CHEMICAL Pepsin breaks down proteins DIGESTION DRAG O 6 Toolarrow_forwardThe process by which the products of digestion pass from the lumen of the gastrointestinal tract into the blood or lymph is: absorption defecation digestion peristalsisarrow_forwardWhich of the following best describes the process of peristalsis smooth muscle contractions that move food through the alimentary canal a common cause of loss of appetite, fatigue, and dehydration voluntary control of the rectal sphincters regulating defecation the transport of nutrients to the liver through the hepatic portal vessel a process of fat emulsification in the small intestinearrow_forward
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