Download - Cell Division Gone Wrong
Mutations
A permanent change in the sequence of DNA of a gene
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Cancer Why does it keep dividing?
The cells checkpoints might fail to identify problems or kill off the cell. As a result...
Cancer
Tumour – a rapidly growing mass of cells
Cancer Benign tumour – the cells stay together and
have no serious effect on surrounding tissues. Malignant tumour – the cells interfere with
the function of neighbouring cells and tissues
Benign tumorMalignant tumour
Cancer Metastasis – occurs when cancer cells break
away from the original tumour and move to a different part of the body.
Causes of Cancer
1. Mutations – random changes that occur in the DNA while it is being duplicated.
Causes of Cancer
2. Carcinogens – are environmental factors that cause mutations. Tobacco Plastics Radiation
X-rays Sunlight
Causes of Cancer
3. Some cancers can be hereditary depending on whether or not you obtain that portion of DNA from your parents. Ex. Breast cancer, colon cancer
Causes of Cancer 4. Infections & Viruses
Virus enters cell and ‘highjacks’ it to reproduce Some viruses insert their own DNA inside the host
cell, causing it to become cancerous
Cancer Screening
This involves checking for cancer even if there are no symptoms. This is important to catch cancer at an early stage. ABCD (asymmetry, border, colour, diameter)
Cancer Fighting ‘Super Foods’