One of the Hormones Not Mentioned in the Text Is

One of the hormones not mentioned in the text is GIP (glucose-dependent insulin trophic peptide) , which stimulates the secretion of insulin. It is secreted by cells of the duodenum in response to the presence of glucose. Its secretion and action on insulin production is an example of a:

A) homeostatic positive feedback mechanism amplifying the response to glucose ingestion.
B) homeostatic negative feedback mechanism keeping a system near a set point.
C) homeostatic negative feedback mechanism changing the set point.