23. The Digestive System

The lamina propria forms part of the:

a. Muscularis externa

b. Submucosa

c. Serosa

d. Mucosa

Which of the following occurs/occur during the cephalic phase of gastric acid secretion?

a. Stimulation of gastrin and histamine release

b. Direct stimulation of parietal cells

c. Inhibition of somatostatin release

d. Both a and b are correct

e. All of the above are correct

Within the gastric glands, which cells would you expect to find closest to the gastric pits?

Nutritionists have found that after a heavy meal, the pH of blood increases slightly, especially in the veins that carry blood away from the stomach. What causes this increase in blood pH?