no carbs food
Through the process of glycolysis, glucose
is broken down to produce ATP. ATP is the currency system of the cell (like dollar bills). It fuels the work that cells need to do. While glucose is a simple sugar, it is still a relatively large molecule, therefore it needs certain
transporters in order to allow it to enter a cell. These are known as GLUTs (glucose transporters).  Contrary to popular belief, not all cells require insulin in order to transport glucose inside of a cell. Some organs and tissues are insulin-independent, meaning insulin is not required, whereas others are insulin-dependent, meaning they require insulin.  GLUT 4 transporters are located on skeletal muscle, adipose tissue, and the heart and do require insulin. In order for glucose to be transported into these cells, insulin must bind to insulin receptors and signal for this process to occur. Insulin is produced by beta cells in the pancreas
in response to high blood glucose levels. Once it is released, it binds to insulin receptors and triggers a response to allow glucose to be transported into the cell.