PCS 181 Chapter Notes - Chapter 4: Carcinogen, Formaldehyde, Social Comparison Theory
22 Apr 2018
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Cancer is not a single disease but a term referring to more than 100 illnesses: cell division is regulated to replace damaged cells, mechanisms are in place to repair damaged dna or activate apoptosis. Cancer results from many gene mutations over time. Malignant tumours are cancerous and invade tissue via metastasis. Carcinoma: develop in skin or tissue cells lining organs, most human cancers are this. Central nervous system: cancers in brain tissue or spinal cord. Types and prevalence of cancer: cancer is the leading cause of death world wide. Incidence rates are becoming stable or increasing modestly while mortality rates are decreasing. Lung cancer: 2nd most diagnosed cancer, prostate cancer, most commonly diagnosed cancer among men, breast cancer, most commonly diagnosed in women. Immunosurveillance when is detects transformed cells it will attempt to destroy them. If is is impaired, tumour cells will grow cancer: natural killer-cell response (nk)
