Control of Cell Division

Miss PollackPlease take out your classwork

notebooks.

So what?

• Asked the question… what happens when the cell does not behave as it is supposed to or according to plan with following through the steps of mitosis?

It is absolutely critical that the cell follows the exact instructions of mitosis with the proper steps

If not, we get cancer cells

Cancer Cells are Immortal

• Cancer is a disorder in which some of the body’s own cells lose the ability to control growth– Lose control – Cancer does not care about what anything else the

cell is doing– Cancer cells divide uncontrollably and form masses

of cells called tumors• These damage the surrounding tissues, takes over its

neighbors

• How does it have the ability to do this?

• It slows or speeds up the cell cycle• It gets past checkpoints during the cell cycle– During interphase– During mitosis– During cytokinesis

• Cell cannot control itself

Most common type of cancer• Melanoma– Skin cancer

• DNA damage to the skin caused by UV radiation from the sun or tanning beds– Causes the cells to get a mutation– Tumors form as masses of cells

SPF 30“Sun protection factor”- Prevents aging of skin- Reduces risk of cancer