CH 23 HW

Which layer of the alimentary canal is responsible for segmentation and peristalsis? mucosa submucosa muscularis externa serosa

Which layer of the alimentary canal contains not only glands and blood vessels but also a nerve plexus that helps regulate digestive activity? serosa muscularis externa submucosa mucosa

The __________ circulation drains all of the organs of the digestive system. splanchnic hepatic portal peritoneal visceral

Which layer of the digestive tract controls digestive propulsion? serosa muscularis externa submucosa mucosa

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? caveolae gap junctions T tubules epimysium

Which digestive process does NOT occur in the mouth? mechanical breakdown ingestion segmentation digestion

What control mechanism opens the gastroesophageal sphincter? pH changes in the esophagus detection of nutrients in the esophagus constriction of the upper esophageal sphincter peristalsis in the esophagus

Which of the following constitute a portal triad? the hepatic artery and two hepatic veins the porta hepatis 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?

What is a major function of pancreatic juice? neutralizing chyme entering the small intestine from the stomach emulsifying fats by breaking them into smaller pieces acidifying the contents of the small intestine acidifying the contents of the stomach

Bile is produced by the __________ under hormonal influence of __________. pancreas; secretin gallbladder; CCK liver; secretin small intestine; CCK

Which of the following is NOT a secretion of the pancreas? bicarbonate nutrient enzymes bile insulin

Which cells in the small intestine's mucosa secrete mucus? enteroendocrine cells enterocytes Paneth cells goblet cells

Which of these best describes a lacteal? a projection of the small intestine wall designed to increase surface area a lymphatic vessel designed to help introduce fats to the blood special capillaries in the villi designed for absorbing food effectively a deep pocket in the intestinal wall where endocrine and antimicrobial cells are located

Most absorption of nutrients occurs in the __________. large intestine duodenum jejunum stomach

Which of the following propels food residue over large areas of the colon three to four times a day? Valsalva's maneuver defecation reflex haustral contractions mass movement

Which of the following is the primary physiological function of the large intestine? primary digestion of food nutrient absorption water absorption and feces elimination mechanical breakdown of food

What type of blood capillary located in this sublayer is uniquely suited for absorption of nutrient material? sinusoidal continuous fenestrated lacteals

Which layer of the alimentary canal is responsible for segmentation and peristalsis? mucosa submucosa muscularis externa serosa

Which layer of the alimentary canal contains not only glands and blood vessels but also a nerve plexus that helps regulate digestive activity? serosa muscularis externa submucosa mucosa

Which of the following constitute a portal triad? the hepatic artery and two hepatic veins the porta hepatis 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 have windows that allow small proteins to pass through but not cells. The walls only allow water to pass through. The walls are continuous, only allowing small molecules and water 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? neutralizing chyme entering the small intestine from the stomach emulsifying fats by breaking them into smaller pieces acidifying the contents of the small intestine acidifying the contents of the stomach

Bile is produced by the __________ under hormonal influence of __________. pancreas; secretin gallbladder; CCK liver; secretin small intestine; CCK