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7:18How does absorption of lipids differ from absorption of carbohydrates and proteins in the small intestine?
a. Lipids are absorbed into a capillary; carbohydrates and proteins are absorbed into a lacteal.
b. Lipids are not absorbed in the small intestine.
c. Lipids are absorbed into a lacteal; carbohydrates and proteins are absorbed into a capillary.
d. They are all absorbed into the same structure.
Which of the following best describes the microscopic structure of the liver?
a. Hexagonal plates of hepatocytes surrounding a central vein with portal triads at each corner
b. Octagonal plates of hepatocytes surrounding a central artery with portal triads at each corner
c. Irregular groups of hepatocytes surrounding a central vein with bile ducts at each corner
d. Hexagonal plates of hepatocytes surrounding a portal vein with bile ducts at each corner
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The mucosa of the esophagus, pharynx, and oral cavity contains simple squamous epithelium to protect it from abrasion.
Which of the following statements about accessory organ secretions is not true?
a. Hepatocytes produce bile, which drains out of the liver via the common hepatic ducts.
b. Saliva contains secretory IgA and lysozyme, which play an important role in preventing the growth of pathogenic bacteria in the oral cavity.
c. Pancreatic juice contains digestive enzymes and bicarbonate ions to neutralize the acidic chyme.
d. The gallbladder produces bile, which drains out of the gallbladder via the cystic duct.
What are the three folds of the small intestine called? What is their purpose?
The primary hormone that triggers the secretion of pancreatic juice and bile is:
a. Gastric inhibitory peptide
b. Cholecystokinin
c. Motilin
d. Somatostatin
