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During swallowing,elevation of the uvula and soft palate prevents food or fluid from entering the nasopharynx.

A) True
B) False

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Which layer(s) of the wall of the GI tract contain a nerve plexus


A) Muscularis only
B) Mucosa and serosa
C) Adventitia only
D) Mucosa and muscularis
E) Submucosa and muscularis

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

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Pepsinogen is an


A) active enzyme that is released in the small intestine and digests carbohydrates.
B) inactive precursor to the enzyme pepsin that digests proteins in the stomach.
C) active enzyme that digests proteins within the small intestine.
D) inactive precursor to a nonspecific enzyme that is synthesized in the pancreas and released in the small intestine.

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

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The gastroenterologist has just determined that you have a blockage in your jejunum and he will have to perform surgery,making a small incision in the wall to remove the obstruction.Which tunic will be cut first


A) Mucosa
B) Submucosa
C) Tunica muscularis
D) Serosa
E) Adventitia

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

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A complex carbohydrate that consists of several repeating units of simple sugars is referred to as a _________.

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Lipids are absorbed from the small intestine into lymphatic capillaries called _________.

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Bile catalyzes the breakdown of triglyceride into a monoglyceride and two free fatty acids.

A) True
B) False

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The term "motility" refers only to involuntary contractions (not voluntary contractions)that mix and move materials through the GI tract.

A) True
B) False

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Describe the anatomy and physiology of swallowing.Specifically,explain the three phases of swallowing,and how they are controlled.

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The cerebrum and skeletal muscles govern...

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The deciduous teeth are the _________ teeth,and there are a total of ____ deciduous teeth.


A) milk;8
B) milk;20
C) wisdom;4
D) permanent;20
E) permanent;28

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

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  -This figure shows an intestinal villus.The structure indicated by number 3 is a A) submucosal gland. B) Brunner gland. C) lymphatic nodule. D) plicae circulares. E) mucous gland. -This figure shows an intestinal villus.The structure indicated by number 3 is a


A) submucosal gland.
B) Brunner gland.
C) lymphatic nodule.
D) plicae circulares.
E) mucous gland.

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

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Protein digestion begins in the


A) stomach.
B) mouth.
C) esophagus.
D) small intestine.
E) large intestine.

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

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Cholecystokinin decreases stomach motility and inhibits release of gastrin.

A) True
B) False

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The _____________ is the region of the oral cavity between the gums and the cheeks or lips.

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The pharynx is lined with a keratinized epithelium to protect against abrasion.

A) True
B) False

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Late one night,while studying for your anatomy class,you open a box of saltine crackers to do a little snacking.After chewing on a starchy morsel for a few minutes,you begin to notice a sweet taste in your mouth.What accounts for this


A) "Sweet" taste receptors are slower to respond than others
B) Activity of bacteria in the mouth lowers the pH
C) Esophageal reflux
D) Salivary amylase activity
E) Phagocytosis by the pharyngeal tonsils produces by-products that taste sweet

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

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Nucleosidase is an enzyme that breaks the


A) phosphodiester bond between nucleotides within DNA.
B) bond that attaches the phosphate to the nucleoside.
C) bond between the sugar and the nitrogenous base of the nucleoside.
D) bonds within the nitrogenous bases of rRNA.

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

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Which organ is not considered an accessory digestive organ


A) Tongue
B) Teeth
C) Pancreas
D) Salivary glands
E) Pharynx

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

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Villi


A) are found throughout the gastrointestinal tract.
B) generate movement of materials in the large intestine.
C) increase surface area in the small intestine.
D) contain both smooth and skeletal muscle fibers.
E) All of the choices are correct.

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

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