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Which of the following is an important dietary recommendation for avoiding heartburn?


A) Eat smaller meals that are lower in fat.
B) Eat large meals.
C) Eat meals low in carbohydrate.
D) Avoid fluids.

E) B) and C)
F) C) and D)

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Excessive acid production in the stomach or upper small intestine could result in


A) poor iron, calcium, and folate absorption.
B) excessive intestinal bacterial growth.
C) an ulcer.
D) decreased fiber digestion and absorption.

E) All of the above
F) A) and C)

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Constipation can best be prevented by


A) eating dietary fiber.
B) restricting fluids.
C) restricting physical exercise.
D) using laxatives.

E) A) and B)
F) B) and C)

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The villi of the small intestine


A) provide an enormous surface area that facilitates absorption.
B) store fat-soluble vitamins.
C) continuously move food through the small intestine to the colon.
D) inactivate enzymes consumed with food.

E) None of the above
F) A) and B)

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The wall of the small intestine is folded, and within the folds are fingerlike projections called _______________.

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Which of the following is true about digestive enzymes?


A) One enzyme can speed many types of chemical processes.
B) Enzymes are not sensitive to temperature.
C) Enzymes that work in the acidic environment of the stomach cannot work in the basic or alkaline environment of the small intestine and vice versa.
D) Enzymes typically work independently of vitamins or minerals.

E) A) and B)
F) C) and D)

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Which of the following is a feature of the lymphatic system?


A) It is composed of a mucus-like substance.
B) It picks up and transports dietary lipid.
C) It serves to transport fat- and water-soluble vitamins to the heart.
D) It funnels nutrients to the liver via a one-way pump.

E) All of the above
F) B) and C)

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All of the following can weaken esophageal sphincter tension and promote heartburn except


A) root beer.
B) coffee.
C) alcohol.
D) nicotine.

E) B) and D)
F) B) and C)

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The muscular contractions that move food through the digestive tract are called


A) regurgitation.
B) peristalsis.
C) propulsion.
D) compression.

E) C) and D)
F) A) and B)

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To which body part does blood travel to pick up oxygen and release carbon dioxide?


A) Heart
B) Lungs
C) Liver
D) Kidneys

E) A) and B)
F) A) and D)

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Peristalsis refers to


A) chewing and swallowing.
B) the opening and closing of sphincters.
C) the action of bile on dietary fat.
D) muscular movement of materials through the GI tract.

E) B) and D)
F) B) and C)

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Which of the following is not considered part of the GI tract?


A) Anus
B) Lungs
C) Colon
D) Esophagus

E) A) and D)
F) A) and C)

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Bone, cartilage, muscle, and nerves are considered


A) organs.
B) organ systems.
C) tissues.
D) organisms.

E) C) and D)
F) B) and D)

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The study of how food impacts health through its interaction with our genes and its subsequent effect on gene expression is called


A) epidemiology.
B) molecular biology.
C) nutrigenomics.
D) genetic engineering.

E) B) and D)
F) A) and B)

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The ________________________ system shelters humans from threats such as diseases and toxins.


A) cardiovascular
B) endocrine
C) immune
D) lymphatic

E) B) and D)
F) None of the above

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After digestion and absorption, which circulatory system carries fat and fat-soluble vitamins?


A) Portal
B) Enterohepatic
C) Lymphatic
D) Mesentery

E) C) and D)
F) A) and C)

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Which of the following is true regarding bile?


A) It is secreted in response to the presence of carbohydrates in the small intestine.
B) It stimulates the release of pancreatic juices.
C) It is produced by the liver.
D) It is a hormone.

E) All of the above
F) C) and D)

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Antibiotic treatment of infection with the bacteria ______________ heals some stomach ulcers and prevents their recurrence.


A) Salmonella
B) Helicobacter pylori
C) E.coli
D) Clostridium botulinum

E) A) and D)
F) None of the above

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The stomach empties into the small intestine through the


A) pyloric sphincter.
B) esophageal sphincter.
C) Sphincter of Oddi.
D) ileocecal sphincter.

E) None of the above
F) B) and C)

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Most nutrients from the digestive tract enter the liver through the _______________ vein.

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