450 SECTION V Gastrointestinal Physiology
MULTIPLE-CHOICE QUESTIONS
For all questions, select the single best answer unless otherwise directed.
- Water is absorbed in the jejunum, ileum, and colon and excreted
in the feces. Arrange these in order of the amount of water
absorbed or excreted from greatest to smallest.
A) colon, jejunum, ileum, feces
B) feces, colon, ileum, jejunum
C) jejunum, ileum, colon, feces
D) colon, ileum, jejunum, feces
E) feces, jejunum, ileum, colon - Drugs and toxins that increase the cAMP content of the intesti-
nal mucosa cause diarrhea because they
A) increase Na+–K+ cotransport in the small intestine.
B) increase K+ secretion into the colon.
C) inhibit K+ absorption in the crypts of Lieberkühn.
D) increase Na+ absorption in the small intestine.
E) increase Cl– secretion into the intestinal lumen. - A patient with a tumor secreting abnormal amounts of gastrin
(gastrinoma) would be most likely to exhibit which of the
following?
A) decreased chief cell exocytosis
B) duodenal ulceration
C) increased gastric pH in the period between meals
D) a reduced incidence of gastroesophageal reflux disease
E) protein malabsorption - Which of the following has the highest pH?
A) gastric juice
B) hepatic bile
C) pancreatic juice
D) saliva
E) secretions of the intestinal glands - Which of the following would not be produced by total
pancreatectomy?
A) vitamin E deficiency
B) hyperglycemia
C) metabolic acidosis
D) weight gain
E) decreased absorption of amino acids
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