Human Physiology Unit 04 Review C: Digestive Question Preview (ID: 37875)
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The mixing movement of the small intestine is called
a) segmentation
b) peristalsis
c) micturition
d) deglutition
why does the upper third of the esophagus have skeletal muscle
a) first phase of swallowing is voluntary
b) so you do not choke
c) so peristalsis can occur
d) to prevent gastro esophageal reflux
________ is required for the intestinal absorption of vitamin B12
a) intrinsic factor
b) pepsin
c) gastrin
d) calcium
Pepsin would have the greatest activity
a) when the pH is less than 3
b) when the pH is greater than 3
c) immediately upon secretion
d) upon entering the duodenum
peristalsis within the intestines is coordinated by
a) the enteric nervous system
b) the parasympathetic nervous system
c) the sympathetic nervous system
d) the somatic nervous system
Inhibition of exocrine pancreatic secretions would result in
a) decreased bile synthesis and secretion
b) decreased insulin secretion following meals
c) stimulation of enterokinase activity
d) presence of an acidic chyme
Wavelike, directional muscular contraction of the gastrointestinal tract is called
a) peristalsis
b) propulsion
c) segmentation
d) mastication
collection and transport of lipids from the digestive tract is carried out by
a) the lymphatic system
b) the hepatic portal system
c) the enterohepatic system
d) the biliary apparatus
lipid digestion involves the coordinated action of
a) lipase, bile
b) hydrochloric acid, pepsin
c) amylase, bicarbonate
d) trypsin, brush border enzymes
bile is produced by
a) hepatocytes
b) gall bladder cells
c) kupffer cells
d) sinusoids
Which of the following is NOT a structure of the small intestine that increases its surface area?
a) rugae
b) microvilli
c) villi
d) circular folds
Which of the following is NOT a section of the small intestine?
a) cecum
b) jejunum
c) ileum
d) duodenum
________ are large capillary spaces separating hepatic plates
a) sinusoids
b) portal triads
c) lobules
d) hepatocytes
digestive enzymes are often secreted in an inactive (zymogen) form in order to
a) prevent digestion of the GI tract itself
b) confuse physiology students
c) allow for regulation of their activity by target organs
d) they are less likely to trigger an autoimmune response
negative feedback control of HCl secretion in the gastric phase is mainly by
a) decrease in gastrin secretion and increase in somatostatin
b) increase in gastrin secretion
c) decrease in somatostatin secretion
d) increase in gastrin secretion and decrease in somatostatin secretion
disaccharides like maltose, lactose, sucrose are broken down by
a) brush border enzymes
b) pancreatic amylase
c) enterokinases
d) cholecystokinin
The transport of digested food into the blood or lymph is
a) absorption
b) deglutition
c) ingestion
d) secretion
the _____ stimulates decreased gastric motility
a) ileogastric reflex
b) GLP-1 reflex
c) gastroileal reflex
d) gastroduodenal reflex
________ is secreted by the ileum and colon and stimulates intestinal secretion of Cl- thereby causing elimination of NaCl and water in the feces
a) Guanylin
b) Motilin
c) Serotonin
d) Ghrelin
the two types of digestion are
a) mechanical; chemical
b) structural; functional
c) catabolic; anabolic
d) physical; enzymatic
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