Download Cell Division Going Wrong: Cancer

Cell Division Going Wrong: Cancer
Cancer is not one disease, but rather a group of diseases in which cells grow and divide out of control.
They result from a change in DNA that controls the cell cycle. Therefore, cells do not remain in
interphase for the normal amount of time. The checkpoints (learned earlier) fail and daughter cells
continue to divide uncontrollably. Since the cells are growing and dividing so rapidly, they deprive
normal cells of nutrients and energy.
The uncontrolled growth and division may create a rapidly growing mass of cells creating a lump
called a tumour.
If the cells of the tumour stay together and have no affect on surrounding cells, it is called a benign
tumour. Cells in a benign tumour are not cancerous.
A malignant tumour interferes with the function of neighbouring cells and tissues, such as enzyme or
hormone production. Cells in a malignant tumour are cancerous.
Some types of cancer may have a hereditary or environmental cause or both. It is not an infectious
disease.
Complete the following activities to learn about the different aspects of cancer.
(Write your answers on lined paper.)
Be sure to include the definitions of any bold terms.
Part A – Cell Growth Rates and Cancer
Graph 1 -___________________________________________________
Part B – Causes of Cancer
On lined paper
Part C – Cancer Screening
On lined paper
Part D – Reducing Your Cancer Risk
Table 1 – Survival Rates for Different Types of Cancer
After five years
Deaths
Survival rate
Type of Cancer
New Cases
Lung
19 600
16 600
Breast
17 000
5400
Colon
16 300
6300
Prostrate
14 300
4100
Bladder
4800
1350
Kidney
3700
1350
Leukemia
3200
1110
15%
Table 2 – Sun Survey Results
Percent of Class who:
Regularly practice Sun
protection behaviours in the
summer.
Suffered at least one major
sunburn in the summer.
Average number of hours per
day spent in the Sun during the
summer.
Part E – Diagnosing & Treating Cancer
On lined paper.
13 – 16 years old
Male
Female
Table 1 – Sun Survey
Record your answers on the class data sheet.
13 – 16 years old
Male
Yes
Do you regularly practice Sun
protection behaviours in the
summer?
Did you suffer at least one major
sunburn in the summer?
How many hours per day do
spend in the Sun during the
summer?
Female
No
Yes
No