Digestive secretions are secreted only when needed. Discuss.

Explanation

The activities of the gastro - intestinal tract are carried out by the neural and hormonal control for proper coordination of different parts. Gastric and intestinal secreations are stimulated by neural signals . Hormonal control of the secreation of digestive juices is carried out by local hormones produced by the gastric and intestinal mucosa. Only presence of food in the alimentary canal triggers the corresponding neural and hormonal controls .