In the human body, when the blood sugar level rises, a hormone known as insulin is released by the pancreas. This hormone speeds up the movement of sugar out of the blood, so the blood sugar level decreases and returns to equilibrium.

Insulin is a harmone secreted by pancreas which is responsible for the control of sugar levels in the blood.

Explanation:

When the blood has high levels of glucose, insulin send signals to the muscle in order to absorb glucose from the blood and stored it in the form glycogen. If insulin is not secreted or didn't perform its functions properly so various diseases like obesity occurs and organs are also resistant to harmone which is not good for health.

it would lead to upper respiratory infections and pneumonia.