Do all muscles must contract to make a movement?

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?

How do living things obtain phosphorus

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur