Sonya has just finished a large birthday dinner. when the waiter offers to give her a complementary birthday dessert, she explains that she is not feeling hungry at the moment. this is likely because her:

Sonya is not feeling hungry because of her PYY levels, i. e., peptide YY levels ae low. PYY is a pancreatic peptide, and is released after eating. It reduces appetite by circulating in the gut and blood. PYY is anorexigenic. Its activity is specific to the colon and ileum.