ANATOMY
GASTRO INTESTINAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In this area of the stomach adaptive relaxation occurs:
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medial portion
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proximal portion
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distal portion
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None of the above
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Explanation:
Detailed explanation-1: -The gastric cardia is defined as the proximal area of the stomach and is demarcated proximal by the squamocolumnar mucosal boundary (Z-line) and distal by the oxyntic mucosa from the fundus and corpus.
Detailed explanation-2: -Accommodation of the stomach to a meal consists of a relaxation of the proximal stomach, providing the meal with a reservoir and enabling a volume increase without an increase in pressure.
Detailed explanation-3: -Hence, with the entry of food as liquid or bolus, the stomach wall receptors are stimulated to relax to take up and store the food swallowed. Receptive relaxation is considered a vagovagal reflex as it is both excited and inhibited by the vagus nerve.
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