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The ________, which begins the mechanical and chemical breakdown of food, is shown at letter E on the figure of the digestive system.

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Which vitamin is needed for production of visual receptors?


A) Vitamin A
B) Vitamin B6
C) Vitamin D
D) Vitamin E
E) Vitamin K

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

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The beginning of the small intestine is called the ________ and is C-shaped and relatively short.

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When the ________ passes too quickly through the small intestines, nutrients are not absorbed.

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The liver is divided into a large right lobe and a small left lobe, which are divided into smaller parts called hepatic ________ that contain macrophages and hepatocytes.

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Which organ of the digestive system connects the mouth and the esophagus?


A) Larynx
B) Pharynx
C) Epiglottis
D) Hiatus
E) Palate

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

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Which organ of the digestive system begins the chemical breakdown of foods?


A) Mouth
B) Pharynx
C) Esophagus
D) Stomach
E) Gallbladder

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

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The pancreatic enzymes that digest nucleic acids are ________.

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Which pancreatic enzyme digests protein?


A) Nuclease
B) Pancreatic lipase
C) Pancreatic amylase
D) Maltase
E) Trypsin

F) A) and B)
G) A) and C)

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Which of these results from the breakdown of the lining of the stomach?


A) Crohn's disease
B) Gastritis
C) Hiatal hernia
D) Stomach ulcer
E) Colitis

F) C) and D)
G) A) and B)

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The ____ is the main site of nutrient absorption.


A) esophagus
B) stomach
C) small intestine
D) large intestine
E) rectum

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

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The ________ sphincter controls the movement of chyme from the ileum to the cecum, which is the beginning of the large intestine.

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Letter B on the figure of the digestive system shows the ________.

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The hepatic duct merges with the ________ duct from the gallbladder to form the common bile duct.

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The most abundant dietary lipids are ________, which are found in meats, eggs, milk, and butter.

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Letter D on the figure of the digestive system represents the ________.

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The gallbladder ____.


A) is essential to digestion
B) releases bile in response to the hormone cholecystokinin
C) increases the absorption of fatty acids and cholesterol
D) produces the enzymes amylase and lipase
E) stores vitamins and iron

F) A) and E)
G) C) and E)

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The ________ cells of the saliva secrete amylase and a fluid made mostly of water.

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In ____, also called heartburn, stomach acids are pushed into the esophagus.


A) Crohn's disease
B) diverticulitis
C) GERD
D) gastritis
E) colitis

F) A) and B)
G) B) and D)

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The ________ is shown at letter K on the figure of the digestive system.

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