Incretins: 1)are a Group of Hormones That Are Released from the the Intestinal

Incretins:
1) are a group of hormones that are released from the intestinal mucosa upon the ingestion of glucose.
2) act on islet beta receptor sites, resulting in insulin release.
3) are a group of hormones that include gastric inhibitory peptide and glucagon-like peptide-1.
4) raise glucose levels by inhibiting insulin secretion, stimulating glucagon secretion, stimulating glycogenolysis, and inhibiting gluconeogenesis.

A) 1, 2, 3, 4
B) 1, 2, 3
C) 1, 2, 4
D) 2, 3, 4