Which organ transports glucose to muscles and regulates insulin?

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

Answer: (C)

This question centers on how insulin is produced and how it influences glucose uptake by muscles. The pancreas houses beta cells that release insulin when blood glucose rises after eating. Insulin acts as a key signal telling muscle (and fat) cells to take in glucose from the bloodstream. It does this by promoting the movement of GLUT4 glucose transporters to the muscle cell membrane, allowing glucose to enter the cell for energy or storage as glycogen.

The liver, while essential in managing blood glucose by storing and releasing glycogen, does not regulate insulin production. The kidneys mainly filter and reabsorb glucose and do not control insulin release, and the spleen is involved in immune functions rather than glucose regulation. Therefore, the organ that regulates insulin—and thereby helps transport glucose into muscle cells—is the pancreas.