INTEGRATED REGULATION OF GASTROINTESTINAL FUNCTION: NEURAL, HORMONAL, AND LOCAL MECHANISMS

Abstract

The gastrointestinal (GI) tract performs essential physiological functions, including digestion, absorption, secretion, and motility, which are vital for maintaining nutritional homeostasis. These complex processes are regulated through an integrated network of neural, hormonal, and local mechanisms that operate in a coordinated manner. The enteric nervous system provides intrinsic control, while extrinsic neural pathways and gastrointestinal hormones modulate activity according to systemic and environmental demands. In addition, local paracrine and autocrine factors fine-tune regional responses within the GI tract. This article reviews the integrated regulatory mechanisms governing gastrointestinal function and emphasizes the importance of their interaction in maintaining normal digestive physiology. Understanding these mechanisms provides a foundation for recognizing functional gastrointestinal disorders and developing targeted therapeutic strategies.