What is the “language” that is used to make messages the body can understand?

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Glucose is a form of sugar found in the blood cells use glucose as a source of energy, but too much or too little can cause serious health issues so, the body uses the hormone insulin to regulate glucose n the blood insulin maintain glucose levels in the blood if blood glucose lovels got very high, what would you expect to see happen to insulin levels?

I’m stuck on this question cuz i’m stupid sksksksk