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chapter 3
Nutrition
Question | Answer |
---|---|
Which of the following is a feature of peristalsis? | It is caused by alternate tightening and relaxing of circular and longitudinal muscles. |
What is an important function of the intestinal villi crypts? | Secretion of juices into the small intestine |
Which part of the GI tract contains highly acidic digestive juices? | Stomach |
What is the function of bile? | It emulsifies fats |
Which substance stimulates the pancreas to release bicarbonate-rich juice? | Secretin |
When nutrients are transported from intestinal epithelial cells to the vascular system, what organ is first to receive them? | Liver |
The presence of fat in the intestines stimulates cells of the intestinal wall to release ____. | cholecystokinin |
What best describes the normal pH of the stomach? | Very acidic |
When consumed on a regular basis, which food promotes healthful changes in the microflora of the GI tract? | Yogurt |
Where is the epiglottis located? | Throat |
Which substance regulates the pH of the stomach? | Gastrin |
What part of the GI tract prevents a person from choking while swallowing? | Epiglottis |
The hepatic portal vein empties into the ____. | Liver |
What is an important function of the intestinal villi crypts? | Secretion of juices into the small intestine |
The purpose of bicarbonate in the digestive process is to ____. | raise the pH of chyme |
One function of sphincter muscles is to ____. | control the passage of food through the GI tract |
One important function of mucus is to ____. | protect the stomach walls from digestion |
What is the function of mucus in the stomach? | It protects stomach cells from gastric juices. |
What is the name of the projections on the inner surface of the small intestine? | Villi |
Which action is associated with the presence of fat in the GI tract? | Slowing of the process of digestion and absorption |
Which substance functions to control the release of hydrochloric acid to prevent excessive acidity? | Gastrin |