BioScope - Cancer -> Cancer Cells Grow Inappropriately Part 2

Cancer Cells Grow Inappropriately

In cancer cells, signals that promote cell growth become stronger than those blocking growth. Such cells grow and divide inappropriately.

Example of growth signals in a non-cancerous cell:

Notice that there are more tumor suppressor genes active than proto- oncogenes. Therefore, cell growth is blocked.

Example of growth signals in a cell becoming cancerous:

Notice that some of the genes have mutated to become oncogenes. In addition, some tumor suppressors are lost. The net effect is increased tumor cell growth.

Example of growth signals in a non-cancerous cell:
	Notice that there are more tumor suppressor genes active than proto- oncogenes. Therefore, cell growth is blocked.
Example of growth signals in a cell becoming cancerous:
	Notice that some of the genes have mutated to become oncogenes. In addition, some tumor suppressors are lost. The net effect is increased tumor cell growth.