Where is Peptide YY (PYY)
primarily produced, and what is its typical response to meal ingestion?

Question

Accepted Answer

L-cells
of the ileum, colon, and rectum; levels increase within 15 minutes and peak 1–2
hours post-meal.

Answer

I-cells of
the duodenum; levels increase within 60 minutes of a low-fat meal.

Answer

K-cells of
the small intestine; levels decrease in proportion to caloric intake.

Answer

X/A-like
cells of the stomach; levels peak immediately before eating.

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