Understanding GI Hormones and How Gastric Juice Is Secreted

Understanding GI Hormones And How Gastric Juice Is Secreted

Question 1. Phases of gastric secretion.
Answer:

1. Cephalic phase

• It occurs even before food enters the stomach

2. Gastric phase

• Once the food enters the stomach, the secretion of gastric juice increases, this is called gastric phase

3. Intestinal phase

• Occurs when food enters duodenum

Question 2. Name any four gastrointestinal hormones.
Answer:

Gastrointestinal hormones are:

• Gastrin
• Secretin
• Cholecystokinin
• Gastric inhibitory peptide
• Vasoactive intestinal polypeptide
• Pancreatic polypeptide
• Somatostatin
• Peptide YY