Art-labeling Activity: Figure 23.16a
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Art-labeling Activity: Figure 23.16b
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Art-labeling Activity: Figure 23.24c
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Art-labeling Activity: Figure 23.27
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Art-labeling Activity: Figure 23.29
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Art-labeling Activity: Figure 23.32d
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Art-labeling Activity: Figure 23.32c
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Which layer of the alimentary canal is responsible for segmentation and peristalsis?
submucosa
muscularis externa
mucosa
serosa
muscularis externa
Which layer of the alimentary canal contains not only glands and blood vessels but also a nerve plexus that helps regulate digestive activity?
serosa
submucosa
muscularis externa
mucosa
submucosa
The __________ circulation drains all of the organs of the digestive system.
splanchnic
hepatic portal
peritoneal
visceral
hepatic portal
Which layer of the digestive tract controls digestive propulsion?
mucosa
serosa
submucosa
muscularis externa
muscularis externa
Unitary smooth muscle is found in all hollow organs except for the heart. What structure do both heart muscle and unitary smooth muscle share that allows them to contract as a functional group?
T tubules
gap junctions
caveolae
epimysium
gap junctions
Which digestive process does NOT occur in the mouth?
mechanical breakdown
digestion
segmentation
ingestion
segmentation
What control mechanism opens the gastroesophageal sphincter?
detection of nutrients in the esophagus
pH changes in the esophagus
constriction of the upper esophageal sphincter
peristalsis in the esophagus
peristalsis in the esophagus
Which of the following constitute a portal triad?
the porta hepatis
the hepatic artery and two hepatic veins
a bile duct along with a portal venule and arteriole
three lobules sharing a common central vein
a bile duct along with a portal venule and arteriole
Which of the following best describes the capillary wall structure found in the liver lobules?
The walls are continuous, only allowing small molecules and water to pass through.
The walls only allow water to pass through.
The walls have windows that allow small proteins to pass through but not cells.
The capillary walls have openings that allow large proteins and small cells to pass through.
The capillary walls have openings that allow large proteins and small cells to pass through.
What is a major function of pancreatic juice?
acidifying the contents of the stomach
acidifying the contents of the small intestine
neutralizing chyme entering the small intestine from the stomach
emulsifying fats by breaking them into smaller pieces
neutralizing chyme entering the small intestine from the stomach
Bile is secreted by the __________ under hormonal influence of __________.
pancreas; secretin
liver; secretin
gallbladder; CCK
small intestine; CCK
liver; secretin
Which of the following is NOT a secretion of the pancreas?
bicarbonate
nutrient enzymes
insulin
bile
Bile
Which cells in the small intestine's mucosa secrete mucus?
enteroendocrine cells
Paneth cells
goblet cells
enterocytes
goblet cells
Which of these best describes a lacteal?
a projection of the small intestine wall designed to increase surface area
a deep pocket in the intestinal wall where endocrine and antimicrobial cells are located
special capillaries in the villi designed for absorbing food effectively
a lymphatic vessel designed to help introduce fats to the blood
a lymphatic vessel designed to help introduce fats to the blood
Most absorption of nutrients occurs in the __________.
jejunum
duodenum
large intestine
stomach
jejunum
Which of the following propels food residue over large areas of the colon three to four times a day?
Valsalva's maneuver
mass movement
haustral contractions
defecation reflex
mass movement
Which of the following is the primary physiological function of the large intestine?
nutrient absorption
mechanical breakdown of food
water absorption and feces elimination
primary digestion of food
water absorption and feces elimination
What type of blood capillary located in this sublayer is uniquely suited for absorption of nutrient material?
fenestrated
continuous
lacteals
sinusoidal
fenestrated