Contact Inhibition- when cells touch one another, the rate of division slows or stops
It’s a type of cell-to-cell communication by secreting chemical signals
When changes occur in the genetic control of these chemicals, cancer can result
Demonstrating Contact Inhibition Normal cells in dish When cells are removed, cells at the edge of gap begin to divide Normal cells stop dividing when bottom of dish is covered. Cancer cells continue to divide, piling on top of each other
Causes of Cancer Cancer is caused by mutations in segments of DNA that control the production of proteins regulating the cell cycle. Carcinogens- substances and agents that are know to cause cancer.