1. 8.3 Notes Cancer and the Cell Cycle

2.  Cell cycle--controlled by proteins and enzymes  Uncontrolled cell division is caused by:  Failure to produce enzymes  Overproduction of enzymes  Production of enzymes at the wrong time  Cell cycle--controlled by proteins and enzymes  Uncontrolled cell division is caused by:  Failure to produce enzymes  Overproduction of enzymes  Production of enzymes at the wrong time

3.  Cancer--Results from uncontrolled cell division  Tumor--Masses of tissue caused by cancer, they deprive normal cells of nutrients  Cancer--Results from uncontrolled cell division  Tumor--Masses of tissue caused by cancer, they deprive normal cells of nutrients

4.  Metastasis--Cancer cells enter the blood stream and spread through out the body to other organs

5.  Causes of Cancer--environmental and genetic factors  Environmental causes--cigarette smoke, air and water pollution, UV radiation  Causes of Cancer--environmental and genetic factors  Environmental causes--cigarette smoke, air and water pollution, UV radiation

6. Healthy LungsSmoker’s Lungs

9. UV Radiation Ultraviolet (UV) photons harm the DNA molecules of living organisms in different ways. In one common damage event, adjacent bases bond with each other, instead of across the “ladder.” This makes a bulge, and the distorted DNA molecule does not function properly.

10.  Cancer prevention--a healthy lifestyle can help prevent cancer  Healthy lifestyle consists of--  healthy diet high in fiber low in fat  Vitamins and minerals  Exercise  Avoiding bad decisions (ex. Tobacco)  Cancer prevention--a healthy lifestyle can help prevent cancer  Healthy lifestyle consists of--  healthy diet high in fiber low in fat  Vitamins and minerals  Exercise  Avoiding bad decisions (ex. Tobacco)