Health Sciences 1002A/B Lecture : Class 15.docx

• School: Western University
• Department: Health Sciences
• Course: Health Sciences 1002A/B
• Professor: Shauna Burke

Document Summary

Tumour: a mass of cells with no physiological purpose. Benign tumour: only dangerous if affects other body functions. Malignant cancer: cancer, can spread to surrounding tissue. 45% men will have cancer in their life time. 40% women will have cancer in their life time. Aging population leading cause of death (canada) followed by heart disease/stroke. All cancers are preventable: tobacco use. 85% of lung cancer cases: 87% of all lung cancer cases prevented by avoiding tobacco exposure, poor diet, exercise habits and obesity = 22% of all cancer deaths. Tumour suppressor gene: normal function is to control cell growth (unmutated oncogene) Mutagens: substances that cause mutations in dna. Carcinogens: mutagens that cause cancer only mutagens that cause cancer. Lifestyle factors are related to modifications in dna: dietary factors. Obesity/physical activity: not correlated to bmi but correlated to fat content (adipose indicator: hormone replacement therapy: high estrogen levels.