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Exam 15: The Digestive System

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Question 151

True/False

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Gastric secretion does not begin until the arrival of food in the stomach.

A) True
B) False

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Question 152

Multiple Choice

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Where is digestion completed

A) stomach
B) on the brush borders of the small intestine epithelial cells
C) small intestine lumen
D) colon

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

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Question 153

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The ileocecal juncture serves as a barrier to prevent bacteria-laden contents of the large intestine from contaminating the small intestine.

In cirrhosis, damaged hepatocytes are permanently replaced by an overgrowth of connective tissue.

What is the intestinal feature responsible for increasing the absorptive surface area the most

Match the control mechanisms, labelled a. through d., with the characteristics. (Options may be used more than once or not at all.) -travel via the blood to alter digestive motility and secretion

Gastric storage takes place in the ____________________ [what part ] of the stomach, whereas gastric mixing takes place in the ____________________.

Vomiting is caused by reverse peristalsis.

Which of these substances is a product from the chemical breakdown of starch

The most potent stimulus for inhibiting gastric motility and emptying is ____________________.

During the oropharyngeal phase of swallowing, how is food prevented from entering the other openings that communicate with the pharynx

Which of the following is NOT a function of saliva

The four basic digestive processes are ____________________, ____________________, ____________________, and ____________________.

Most of the digestive secretions do not remain in the fecal material.

Which of these statements describes chymotrypsinogen

The three gastrointestinal hormones that function as enterogastrones are ____________________, ____________________, and ____________________.

The principal clinical manifestation of pancreatic exocrine insufficiency is incomplete protein digestion resulting from deficiency of the powerful pancreatic proteolytic enzymes.

As food leaves the stomach, gastric secretion is reduced.Which of these factors does NOT contribute to this reduction

The primary factor responsible for forward propulsion of chyme through the small intestine is mass movements.

Match the hormone(s) , labelled a. through d., to the descriptions. (Options may be used more than once or not at all.) -stimulated primarily by the presence of protein