Which organ produces insulin?

• A. Liver
• B. Stomach
• C. Pancreas
• D. Small intestine

Answer: (C)

Insulin is produced by the beta cells of the pancreas, which has endocrine and exocrine roles. The islets of Langerhans within the pancreas secrete insulin in response to rising blood glucose after meals. Insulin facilitates glucose entry into muscle and adipose tissue and promotes glycogen storage in liver tissue, helping to lower blood glucose levels. The liver itself doesn’t produce insulin; it responds to it. The stomach and small intestine have digestive and hormonal roles, but they do not synthesize insulin. This is why the pancreas is the correct organ.