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BI117 Ch.14 The digestion of which macronutrients occurs primarily in the stomach?
  • vitamins
  • carbohydrates
  • proteins
  • lipids
BI117 Ch.14 The digestion of which macronutrients occurs primarily in the stomach? Answer: -Chemical digestion of proteins begins in the stomach through the activity of gastric juice.
BI117 Ch.14 Which enzyme digests most dietary carbohydrates?
  • pancreatic lipase
  • cholecystokinin (CCK)
  • amylase
  • pepsin
BI117 Ch.14 Which enzyme digests most dietary carbohydrates? Answer: amylase
- Amylase digests most carbohydrates, such as amylase.
BI117 Ch.14 Food is propelled forward through the GI tract by waves of muscular contraction called ________.
  • peristalsis
  • segmentation
  • motility
  • stretching
BI117 Ch.14 Food is propelled forward through the GI tract by waves of muscular contraction called ________. Answer: peristalsis - Peristalsis is a wave of muscular contractions that propels food forward.
BI117 Ch.14 Gastric juice does NOT contain ________.
  • pepsinogen
  • HCI
  • amylase
  • fluid
BI117 Ch.14 Gastric juice does NOT contain ________. Answer:amylase - Amylase is a component of saliva and is also secreted by the pancreas into the duodenum.
BI117 Ch.14 Blockage or malfunction of the pyloric sphincter would affect movement of GI tract contents ________.
  • from the stomach into the small intestine
  • from the rectum, out of the body
  • from the esophagus into the stomach
  • from the small intestine into the large intestine
BI117 Ch.14 Blockage or malfunction of the pyloric sphincter would affect movement of GI tract contents ________. Answer: from the stomach into the small intestine -The pyloric sphincter separates the stomach from the small intestine and regulates passage of stomach contents into the small intestine.
BI117 Ch.14 The function of the gallbladder is to ________.
  • store and release bile
  • store pancreatic enzymes
  • produce bile
  • secrete digestive enzymes
   
BI117 Ch.14 The function of the gallbladder is to ________. Answer: store and release bile
-The gallbladder stores and releases bile produced by the liver.
BI117 Ch.14 Which organ secretes enzymes that help digest all three major nutrient groups, including carbohydrates, proteins, and lipids?
  • salivary glands
  • stomach
  • liver
  • pancreas
BI117 Ch.14 Which organ secretes enzymes that help digest all three major nutrient groups, including carbohydrates, proteins, and lipids? Answer: pancreas -The pancreas secretes pancreatic amylase (digests carbohydrates), three different proteases (digest proteins), and lipase (digests lipids).
BI117 Ch.14 A primary function of the large intestine (colon) is to ________.
  • secrete digestive enzymes
  • absorbwater from feces
  • absorb most of the nutrients in food
  • regulate the production of red blood cells
BI117 Ch.14 A primary function of the large intestine (colon) is to ________. Answer:absorb water from feces -The large intestine absorbs water.
BI117 Ch.14 Which layer of the digestive tract is in direct contact with the digestive tract contents?
  • submucosa
  • muscularis
  • serosa
  • mucosa
BI117 Ch.14 Which layer of the digestive tract is in direct contact with the digestive tract contents? Answer:mucosa -The mucosa is the innermost layer of the GI tract. This layer is in direct contact with the gastrointestinal tract contents.
BI117 Ch.14 All of the following macromolecules are paired with their absorbable digestion end product EXCEPT ________.
  • protein - amino acids
  • sucrose - glucose and fructose
  • starch - glyceride
  • triglycerides - monoglycerides and fatty acids
BI117 Ch.14 All of the following macromolecules are paired with their absorbable digestion end product EXCEPT ________. Answer: starch - glyceride -This is false. The absorbable digestion product of starch is glucose, not glyceride.
BI117 Ch.14 What is the primary digestive function of bile?
  • the breakdown and metabolism of old RBCs
  • the enzymatic digestion of proteins
  • the enzymatic digestion of carbohydrates
  • the physical emulsification of fats to form micelles
BI117 Ch.14 What is the primary digestive function of bile? Answer: the physical emulsification of fats to form micelles - Emusification is the physical dispersion of fats into microglobules that can be digested by pancreatic lipase.
BI117 Ch.14 Most digestion and absorption of nutrients and water occurs in the ________.
  • esophagus
  • stomach
  • oral cavity
  • small intestine
BI117 Ch.14 Most digestion and absorption of nutrients and water occurs in the ________. Answer: small intestine -The small intestine is responsible for almost all nutrient digestion and absorption.
BI117 Ch.14 Which of the following is NOT a function of the liver?
  • storage of glycogen
  • metabolism of toxins
  • storage of fat-soluble vitamins
  • production of red blood cells
BI117 Ch.14 Which of the following is NOT a function of the liver? Answer: production of red blood cells -This is false. The liver destroys worn-out red blood cells. The blood cells are actually produced in the bone marrow.
BI117 Ch.14 Which of the following is NOT part of the structure of the small intestine?
  • lacteal
  • villi
  • cilia
  • microvilli
BI117 Ch.14 Which of the following is NOT part of the structure of the small intestine? Answer: cilia -Cilia are not found in the small intestine.
BI117 Ch.14 Which of the following protein sources could be combined in order to get a balance of all of the essential amino acids?
  • dried beans and corn
  • corn and wheat
  • black-eyed peas and asparagus
  • almonds and lima beans
BI117 Ch.14 Which of the following protein sources could be combined in order to get a balance of all of the essential amino acids? Answer: dried beans and corn -Both of these are incomplete protein sources by themselves, but together they provide complete protein.
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