During feeding behavior in insects like the fruit fly, food is stored in a collapsible sac called the crop (seen here). To tell the insect when to stop eating, receptors in the crop signal to the brain that they are being stretched, causing the insect to be less responsive to food stimuli and terminate feeding. In humans, stretch receptors in the stomach lining activate when food enters and distends the stomach, signaling for the release gastric juice.
Image by Peter McLean, Yale University School of Medicine.
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During feeding behavior in insects like the fruit fly, food is stored in a collapsible sac called the crop (seen here). To tell the insect when to stop eating, receptors in the crop signal to the brain that they are being stretched, causing the insect to be less responsive to food stimuli and terminate feeding. In humans, stretch receptors in the stomach lining activate when food enters and distends the stomach, signaling for the release gastric juice.

Image by Peter McLean, Yale University School of Medicine.

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