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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 {"dropdown-group-1":"A"}

Explanation

A. Stomach: The stomach mixes the food with gastric juices, converting the solid bolus into a semi-liquid substance called chyme.
B. Small intestine: The small intestine receives chyme but does not liquefy the bolus.
C. Mouth: The mouth forms the bolus through mastication and saliva, but it does not produce chyme.
D. Esophagus: The esophagus only transports the bolus via peristalsis and plays no role in liquefying it.

Correct Answer is A

Explanation

A. Body’s water volume is high: When well-hydrated, ADH secretion is low, resulting in dilute (hypotonic) urine as the kidneys excrete excess water.
B. Body’s pH is low: This would affect acid-base balance, not urine tonicity directly.
C. Output of antidiuretic hormone is high: High ADH increases water reabsorption, leading to concentrated (hypertonic) urine.
D. Output of natriuretic peptides is high: These promote Na⁺ and water loss, but hypotonic urine isn't guaranteed.
E. Person is lost and deprived of drinking water: In dehydration, ADH increases, and urine becomes concentrated, not hypotonic.

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