Question

what does gastrin do? it stimulates the pancreas to secrete bicarbonate - rich juices into the small intestine to maintain a slightly alkaline ph. it stimulates the pancreas to secrete enzyme - rich juices to digest fats and proteins. it stimulates stomach glands to release the components of hydrochloric acid to maintain an acidic ph. it stimulates the gallbladder to secrete bile into the duodenum to emulsify fats.

Explanation:

Gastrin is a hormone produced by the stomach. Its main function is to stimulate the stomach glands to secrete the components of hydrochloric acid, which helps maintain an acidic environment in the stomach for digestion. The other options describe functions of other digestive - related substances. For example, secretin stimulates the pancreas to secrete bicarbonate - rich juices, pancreatic enzymes are secreted to digest fats and proteins (but not directly stimulated by gastrin), and cholecystokinin stimulates the gallbladder to secrete bile.

Answer:

It stimulates stomach glands to release the components of hydrochloric acid to maintain an acidic pH.