2. If we could monitor the concentration of gastrin in blood, which of the follo

Question

2. If we could monitor the concentration of gastrin in blood, which of the following manipulations would increase gastrin levels in the blood of volunteers who had not eaten for 24 hours. a. the smell of good food b. the presence of food in the stomach c. decreasing the pH of the contents of the duodenum below 2 d. a and b e. a, b, and c 3. A student was given the following problem: the student had a tube that could be placed anywhere in the digestive system of a brave volunteer though which a small volume of solution could be inserted. The student had two solutions, one with a pH of 1.5 and the other with a pH of 4. The student wanted to cause a decrease in gastric acid secretion and an increase in liver and pancréatic secretions. The student could only place the tube in one location in the gastrointestinal tract, and the student could only use each solution once. Select the most appropriate procedure a. tube location - stomach: solution-pH 15 b. tube location - stomach: solution-pH 4 c. tube location - duodenum: solution-pH 1.5 d. tube location - duodenum: solutions-pH-4 e. tube location -colon: solution-pH 4

Explanation / Answer

Ans.2.

The choice is (e).

The smell of good food (Cephalic phase), the presence of food in the stomach (Gastric phase) and decreasing the pH of the contents of the duodenum below 2 (Intestinal phase) increases gastrin levels in blood.

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