Which organ primarily produces the hormone that regulates blood sugar?

• A. Pancreas
• B. Liver
• C. Kidney
• D. Spleen

Answer: (A)

Insulin, the hormone that lowers blood sugar after a meal, is produced by the pancreas. The pancreas contains beta cells in clusters called islets that release insulin in response to rising blood glucose, promoting glucose uptake into muscle and fat cells and signaling the liver to store glucose as glycogen. The liver helps regulate blood sugar by storing and releasing glucose, but it does not synthesize insulin. The kidney and spleen do not produce the hormone that controls blood sugar.