Content Objectives
The learner will (TLW):
|
Essential Questions
|
Regulation of the Cell cycle
If the cell cycle goes out of control, cancer can result. Cancer is uncontrolled cell division. To regulate means “to control.” Regulation of the cell cycle is important for healthy cell growth. Internal means “inside” and external means “outside.” Information from both inside and outside the cell—internal and external factors—help regulate the cell cycle.
External Factors
There are external physical and chemical signals that help regulate the cell cycle. When cells come across other cells they stop dividing.
Internal Factors
When external factors bind to a receptor on the cell membrane, a response inside the cell begins. These internal factors include enzymes and proteins that help the cell move through the cell cycle.
|
|
|
|
Carcinogens: cancer causing agents
|
|