!! Cancer

Question 1

what causes a tumour to develop

Answer 1

growth by mitosis tightly controlled, DNA in nucleus telling cells when to divide and when to stop

sometimes, changes take place in these genes leading to uncontrolled growth and mitosis, producing a tumour

Question 2

2 types of tumour

Answer 2

benign

malignant

Question 3

what are benign tumours

Answer 3

growths of abnormal cells which are found in one area

usually contained by a membrane, therefore don’t invade other parts of the body

Question 4

how to malignant spread

Answer 4

malignant cells invade neighbouring tissues and move into the bloodstream

then spread to different parts of the body and form new tumours, called secondary tumours

Question 5

risk factors of cancer, just names not explained

Answer 5

genetics

lifestyle

substances in our enviroment

Question 6

how can lifestyle increase the likelihood of developing cancer

Answer 6

lung cancer linked to smoking

skin cancer from exposure to UV light, e.g through sunbathing

mouth and throat cancer linkedd to alcohol

Question 7

how can substances in your environment increase the likelihood of developing cancer

Answer 7

e.g radon increase risk of developing lung cancer

as it releases ionising radiation which damages the DNA in cells

which can cause them to ubcontrolable cell division

Question 8

how can genetic increase the likelihood of developing cancer

Answer 8

inherit an increased risk to certian cancers

e.g prostate cancer, large intestine cancer and certian types of breast cancer