Insulin. Insulin is a hormone made by the beta cells in the pancreas. It is the key that opens the doors of cells and allows glucose to get into the cell. Each cell needs glucose to function. Carbohydrates in food are broken down into glucose which enters the blood stream.
The pericycle is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants.
The division of pericycle cells initiates the formation of new lateral roots, present in most plants. During this process, the pericycle cells push through several cell layers that form the root, including the endodermis. The structure that originates a new lateral root is called lateral root primordium.