1. Regulating the cell cycle
10-3

2. What regulates the cell cycle?
Cyclin = protein that regulates the growth of a cell.
Internal regulators = proteins that respond to events inside the cell.

3. External regulators = proteins that respond to events outside the cell.
When a cell comes in contact with another cell they will stop growing and stop dividing.

4. What is cancer? Uncontrolled cell growth
When a cell does not respond to the chemical signals that tell it to stop dividing.
The cell continues to divide and does not stop.

6. Causes of Cancer
Smoking
Radiation
Viral infections

7. Treatments for Cancer
Radiation
Chemotherapy
Surgery