If the pancreas does not produce enough insulin, why does blood sugar control become difficult?

Correct answer: Because insulin helps control the glucose level in blood

The governing concept is hormonal regulation of blood glucose. The pancreas, specifically its endocrine cells, secretes insulin when blood glucose rises. Insulin promotes uptake and use of glucose by body cells and supports its storage as glycogen, thereby lowering excess glucose in the blood. If too little insulin is produced, this regulation is impaired and blood glucose may remain abnormally high. Option A is correct; the other choices assign unrelated or false functions to insulin.