Combustion is a chemical reaction that produces heat and light. The most common form of combustion is fire. Most forms of combustion happen when the gas oxygen joins with another substance.For example, when wood burns, oxygen in the air joins with carbon in wood.ombustion is a chemical reaction that produces heat and light. The most common form of combustion is fire. Most forms of combustion happen when the gas oxygen joins with another substance.
The role of insulin in the body. It may be easier to understand the importance of insulin therapy if you understand how insulin normally works in the body and what happens when you have diabetes. Regulate sugar in your bloodstream. The main job of insulin is to keep the level of glucose in the bloodstream within a normal range.
How Insulin Works to Regulate Blood Glucose. Insulin is like a key that opens up the locks on your body's cells so that glucose (blood sugar) can get inside and be used for energy. Insulin Helps Glucose. Get Into Your Body's Cells. If the glucose can't get into your cells, it builds up in your blood stream. If left untreated, high blood glucose can cause long-term complications.