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Which of the following is (are) NOT important as a stimulus in the gastric phase of gastric secretion?

A.

peptides

B.

distention

C.

low acidity

D.

carbohydrates

Answer and Explanation

The Correct Answer is D

A. Peptides: Peptides in the stomach stimulate G cells to release gastrin, which enhances gastric secretion.
B. Distention: Stretch receptors in the stomach wall respond to distention and activate gastric secretions via reflexes.
C. Low acidity: A rise in pH (low acidity) following food entry triggers gastrin release.
D. Carbohydrates: Carbohydrates do not significantly stimulate gastric secretions; proteins are the primary stimulus during the gastric phase.


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Related Questions

Correct Answer is E

Explanation

A. 2 ATP: This is the ATP yield from glycolysis (net gain), not fatty acid oxidation.
B. 18 ATP: Too low for a 16-carbon fatty acid-this number is far below the actual ATP yield from fatty acid metabolism.
C. 36 ATP: This is the approximate ATP yield from glucose oxidation, not a 16-carbon fatty acid.
D. 38 ATP: Also close to glucose metabolism; still too low.
E. 129 ATP: Beta-oxidation of a 16-carbon fatty acid (e.g., palmitic acid) generates 129 ATP molecules, making it far more energy-dense than glucose.

Correct Answer is {"dropdown-group-1":"B"}

Explanation

A. Cephalic: The cephalic phase occurs before food enters the stomach, triggered by sight, smell, or thought of food, and stimulates gastric secretion via the vagus nerve.
B. Gastric: The gastric phase begins when food enters and stretches the stomach, triggering myenteric and vagovagal reflexes that stimulate acid and enzyme secretion.
C. Intestinal: The intestinal phase involves chyme entering the duodenum, which moderates gastric activity, mostly inhibitory.
D. Gastrointestinal: “Gastrointestinal” is a general term and not one of the specific phases of gastric secretion.
E. Mesenteric: “Mesenteric” refers to the mesentery (tissue supporting the intestines), not a phase of digestion.

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