the absorptive effectiveness of the small intestine is enhanced by increasing the surface area of the mucosal lining. which of the following accomplish this task?
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The absorptive effectiveness of the small intestine is enhanced by increasing the surface area of the mucosal lining. Which of the following accomplish this task? A) the rugae and haustra B) Brunner's glands and Peyer Patches C) the vast array of digest
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The absorptive effectiveness of the small intestine is enhanced by increasing the surface area of the mucosal lining. Which of the following accomplish this task?
A. The rugae and haustra
B. Brunner's glands and Peyer Patches
C. The vast array of digestive enzymes
D. villi, and microvilli
Small Intestine:
The small intestine is a long convoluted organ (about 22 feet) that forms the middle section of the gastrointestinal tract. The first section of this organ is the duodenum which functions in the chemical digestion of food. The middle and final sections are called jejunum and ileum , and are responsible for the absorption of nutrients, electrolytes, water, and vitamins.
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The correct answer is option D. Villi and microvilli
The villi and microvilli are modified structures present in the small intestine which, increase...
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Villi: Function, Definition & Structure
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Chapter 1 / Lesson 14
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What are villi? Find villi definition, villi location, and villi function. Learn the structure of villi, and the role and purpose of villi in the small intestine.
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The chemical and mechanical processes of food breakdown are called ________.
A) digestion B) absorption C) ingestion D) secretion
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A. digestion
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If an incision has to be made in the small intestine to remove an obstruction, the first layer of tissue to be cut is the ________.
A) serosa B) mucosa
C) muscularis externa
D) submucosa
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A. serosa
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Terms in this set (42)
The chemical and mechanical processes of food breakdown are called ________.
A) digestion B) absorption C) ingestion D) secretion A. digestion
If an incision has to be made in the small intestine to remove an obstruction, the first layer of tissue to be cut is the ________.
A) serosa B) mucosa
C) muscularis externa
D) submucosa A. serosa
Which of the following is not a factor that helps create the stomach mucosal barrier?
A) thick coating of bicarbonate-rich mucus
B) tight junctions of epithelial mucosa cells
C) replacing of damaged epithelial mucosa cells
D) production of intrinsic factor
D. production of intrinsic factor
Which hormone causes an increased output of enzyme-rich pancreatic juice and stimulates gallbladder contraction to release bile?
A) gastrin B) secretin C) cholecystokinin
D) gastric inhibitor peptide
C. cholecystokinin
The absorptive effectiveness of the small intestine is enhanced by increasing the surface area of the mucosal lining. Which of the following accomplish this task?
A) plicae circulares, villi, and microvilli
B) the vast array of digestive enzymes
C) Brunner's glands and Peyer Patches
D) the rugae and haustra
A. plicae circulares, villi, and microvilli
Which of the following is not true of saliva?
A) cleanses the mouth
B) contains enzymes that begin the breakdown of proteins
C) moistens food and aids in compacting of the bolus
D) dissolves food chemicals so they can be tasted
B. contains enzymes that begin the breakdown of proteins
Hydrochloric acid is secreted by which of the secretory cells of the stomach?
A) chief cells B) parietal cells C) serous cells
D) mucous neck cells
B. parietal cells
Gastrin, histamine, endorphins, serotonin, cholecystokinin, and somatostatin are hormones or paracrines that are released directly into the lamina propria. Which of the following cell types synthesize and secrete these products?
A) enteroendocrine cells
B) parietal cells C) zymogenic cells
D) mucous neck cells
A. enteroendocrine cells
Peristaltic waves are ________.
A) segmental regions of the gastrointestinal tract
B) churning movements of the gastrointestinal tract
C) back and forth movements of the gastrointestinal tract
D) waves of muscular contractions that propel contents from one point to another
D. waves of muscular contractions that propel contents from one point to another
You have just eaten a meal high in complex carbohydrates. Which of the following enzymes will help to digest the meal?
A) gastrin B) amylase C) cholecystokinin D) trypsin B. amylase
Hepatocytes do not ________.
A) produce digestive enzymes
B) process nutrients
C) store fat-soluble vitamins
D) detoxify toxic chemicals
A. produce digestive enzymes
Which of the following is (are) not important as a stimulus in the gastric phase of gastric secretion?
A) distention B) carbohydrates C) peptides D) rising acidity B. carbohydrates
Which of the following is not characteristic of the large intestine? It ________.
A) does not contain villi
B) exhibits external muscular bands called teniae coli
C) is longer than the small intestine
D) has pocket-like sacs called haustra
C. is longer than the small intestine
Select the correct statement about absorption.
A) Eighty percent of ingested materials have been absorbed by the end of the large intestine.
B) Lipids are brought into the cell as a mechanism of active transport with Na+ ions.
C) If intact proteins are transported across the villus epithelium, an immune response may be generated.
D) Amino acid transport is linked to chloride transport.
C. If intact proteins are transported across the villus epithelium, an immune response may be generated.
The function of the hepatic portal circulation is to ________.
A) carry toxins to the venous system for disposal through the urinary tract
B) collect absorbed nutrients for metabolic processing or storage
C) distribute hormones throughout the body
D) return glucose to the general circulation when blood sugar is low
B. collect absorbed nutrients for metabolic processing or storage
Choose the correct statement about the pancreas:
A) The pancreas is stimulated to produce HCO3- rich pancreatic juice by somatostatin
B) The pancreas produces acidic pancreatic juice to help neutralize the basic secretions of the stomach
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