The hormone 'secretin' stimulates the secretion of:

Secretin stimulates the activity of . . . . . . .

Identify the type of gastrointestinal hormone based on the functions given below:
$I.$ Stimulates the crypts of Lieberkuhn
$II.$ Inhibits the secretion of glucagon by alpha cells
$III.$ Stimulates Brunner's glands to release mucus
Choose the correct option accordingly.

Secretion of gastric juice is controlled by

Which of the following is a gastro-intestinal enzyme?

Which hormone stops the secretion of $HCl$ from parietal cells of the stomach?