Regulating the Cell Cycle Chapter 10-3

Controls on Cell Division When there is an injury such as a cut in the skin or break in a bone, the cells at the edge of the injury are stimulated to divide rapidly.

Controls on Cell Division When the healing process nears completion, The rate of cell division slows down, controls on growth are restored, and every thing returns to normal.

Cell Cycle Regulators Cyclins regulate the timing of the cell cycle in the eukaryotic cells.

Cell Cycle Regulators Internal regulators they are proteins that respond to events inside the cell.

Cell Cycle Regulators External regulators: Direct cells to speed up or slow down the cell cycle. They include growth factors They prevent excessive cell growth and keep the tissues of the body from disrupting each other.

Uncontrolled Growth Cancer is a disorder in which some of the body’s cells lose the ability to control growth. Uncontrolled growth of cells in the body.

Uncontrolled Growth Cancer cells don’t respond to signals that regulate growth. Cancer cells form masses of cells called tumors. Cancer cells break loose and spread throughout the body.

Uncontrolled Cell Growth Cancer is a disease of the cell cycle.