What does GIP stimulate in the pancreas?

Gastric Inhibitory Polypeptide (GIP) is a hormone secreted by the K cells of the duodenum in response to the presence of glucose and fats in the small intestine. One of its primary roles is to enhance insulin secretion from the pancreatic beta cells in the presence of elevated blood glucose levels. By promoting insulin secretion, GIP helps to facilitate glucose uptake by cells, leading to a decrease in blood glucose levels and supporting energy metabolism. This mechanism is part of the body's physiological response to maintain homeostasis and ensure that cells have the glucose they need for energy.

In contrast, the other options do not reflect the primary action of GIP. For instance, glucagon secretion is generally stimulated in response to low blood glucose levels, while gastrin is primarily involved in gastric function and is not directly related to GIP's action on the pancreas. Hepatic glucose production is related to glucagon’s function and is not stimulated by GIP. Thus, the correct choice highlights GIP's important role in stimulating insulin secretion, making it crucial for glucose regulation in the body.