Exam 16: A--The Digestive System

Complete each of the following statments. The most potent stimulus for inhibiting gastric motility and emptying is ____________________ in the ____________________ lumen.

Which of the following is not a function of the liver?

During the oropharyngeal phase of swallowing, food is prevented from

Chyme is produced in the stomach.

The primary factor responsible for moving the chyme forward in the small intestine is

Complete each of the following statments. The presence of ____________________ in the stomach is the main stimulus to enhance gastric secretion.

Of the fluid entering the small intestine, ____ percent is reabsorbed.

Select the terminal portion of the colon.

Gastric secretion does not begin until the arrival of food in the stomach.

Parasympathetic and sympathetic stimulation both increase salivary secretion, contrary to the usual antagonistic activity of these two components of the autonomic nervous system.

Epithelial cells are continually being shed from the villi because

Gastrin is not secreted during the cephalic phase of gastric secretion.

Protein digestion begins in the stomach under the influence of pepsinogen; it continues in the duodenal lumen under the influence of pancreatic proteolytic enzymes; and it is completed intracellularly in the small intestinal brush border.

Lactose intolerance

There is continuous salivary secretion due to constant low-level stimulation by the parasympathetic nerve endings within the salivary glands.

What helps prevent food from entering the trachea during swallowing?

The enzyme that breaks down table sugar is

Complete each of the following statments. A(n) ____________________ ulcer is an erosion of the stomach wall.

The parietal cells of the gastric mucosa secrete

9,500 ml of fluid is absorbed from the digestive tract daily. The ultimate source of most of this fluid is