Approximately how many hormones regulate GI processes?

Approximately how many hormones regulate GI processes?

• A. 60
• B. 100
• C. 80
• D. 120

Answer: (C)

The main idea is that the GI system is regulated by a large network of signaling molecules, not just a few. A wide range of hormones and gut peptides—produced by enteroendocrine cells in the gut and by other tissues—modulate secretion, motility, absorption, and blood flow. Because of this complexity, the count is estimated in the realm of dozens to about a hundred, depending on how one defines and groups related molecules. In this material, about eighty distinct hormones and gut peptides are recognized as regulators of GI processes. That makes this option the most reasonable pick among the choices, since it sits in the middle of the common estimates and reflects the breadth of signals involved. Some well-known examples include gastrin, secretin, cholecystokinin, GIP, motilin, VIP, ghrelin, peptide YY, GLP-1, neurotensin, and somatostatin, illustrating how diverse and multifunctional these regulators are.

The main idea is that the GI system is regulated by a large network of signaling molecules, not just a few. A wide range of hormones and gut peptides—produced by enteroendocrine cells in the gut and by other tissues—modulate secretion, motility, absorption, and blood flow. Because of this complexity, the count is estimated in the realm of dozens to about a hundred, depending on how one defines and groups related molecules.

In this material, about eighty distinct hormones and gut peptides are recognized as regulators of GI processes. That makes this option the most reasonable pick among the choices, since it sits in the middle of the common estimates and reflects the breadth of signals involved. Some well-known examples include gastrin, secretin, cholecystokinin, GIP, motilin, VIP, ghrelin, peptide YY, GLP-1, neurotensin, and somatostatin, illustrating how diverse and multifunctional these regulators are.