1. KEY CONCEPT Cell cycle regulation is necessary for healthy growth.

2. Internal and external factors regulate cell division.
External factors include physical and chemical signals.
Internal factors include what is coded for in genes.

3. Carcinogens are substances known to promote cancer
Smoke, radiation, UV rays
Standard cancer treatments typically kill both cancerous and healthy cells.

4. Cancer cells do not carry out necessary functions.
Cancer cells come from normal cells with damage to genes involved in cell-cycle

5. Tumors are disorganized clumps of cells.
Benign tumors remain clustered and can be removed….NON-cancerous.
Malignant tumors metastasize, or break away, and can form more tumors…are cancerous
cancer cell
bloodstream
normal cell

6. Apoptosis is programmed cell death.
a normal feature of healthy organisms
Your cells with “kill” themselves in cell cycle if they find out there is
an error
occurs in development of infants to
make your
fingers!
webbed fingers