In order to prevent self-digestion of the pancreas activation of pancreatic proteases occurs in the
During deglutition, the bolus passes into the stomach from the esophagus through the
During the intestinal phase of gastric regulation,
the stomach is initially stimulated, and later inhibited.
Blood flows into the liver via the ___________ and ___________, while blood exits the liver via the ______________.
Hepatic portal vein; hepatic artery; hepatic vein
The major outcome that occurs through mechanical digestive activities is
an increase in the surface area of food by breaking it into smaller fragments.
The stimulus for the release of pancreatic enzymes is
The presence of chyme containing proteins and fats in the duodenum.
This structure is a modified portion of the small intestine mucosa that greatly increases the absorptive surface area.
Which activity below is a mixing action that exposes materials to secretions and absorptive surfaces?
Which of the following is a characteristic of the large intestine?
It contains a large number of bacteria.
Which sequence below represents the correct layering of the wall of the GI tract beginning with the layer next to the lumen?
Mucosa - submucosa - muscularis externa - serosa
The ampulla of Vater (a.k.a. hepatopancreatic ampulla) is formed from the union of the
common bile duct and pancreatic duct
What would be the effect of stripping the small intestines of their villi?
Decreased surface area for absorption would cause weight loss to occur.
The digestive system in a cadaver is longer than in a living person because in a cadaver there is no
Which of the following statements about the mesentery is incorrect?
It is composed of a layer of serous membrane fused with a layer of mucus membrane.
Particularly large collections of lymphoid follicles are found in the pharynx and the
Halitosis is caused by
increased activity of anaerobic bacterial activity at the back of the tongue.
Which of the following conditions is directly associated with an increased risk for heart disease and stroke?
Which of the following would not directly stimulate the secretion of gastrin?
a low pH of gastric content
HCl secretion is stimulated by the binding of all of the following substances except