NEETZoologyChemical Coordination and Integration
What are growth factors?
Options
- AHormones secreted by endocrine glands
- BHormones secreted by non-endocrine tissues
- CHormones secreted by endocrine cells in the gastro-intestinal tract
- DNone of the above
Correct answer
B. Hormones secreted by non-endocrine tissues
Step-by-step solution
Endocrine cells present in different parts of the gastro-intestinal tract secrete four major peptide hormones, namely gastrin, secretin, cholecystokinin (CCK) and gastric inhibitory peptide (GIP). Gastrin acts on the gastric glands and stimulates the secretion of hydrochloric acid and pepsinogen. Secretin acts on the exocrine pancreas and stimulates secretion of water and bicarbonate ions. CCK acts on both pancreas and gall bladder and stimulates the secretion of pancreatic enzymes and bile juice, respectively. GIP