health issues Flashcards
what are major risk factors of health? (3)
smoking
obesity
alcohol
why is smoking a risk to health?
increased chance of lung cancer
why is obesity a risk to health?
increased chance of heart disease
why is alcohol a risk to health?
increased chance of liver disease and brain function damage
what is diabetes?
where the cells in the body are less sensitive or resistant to insulin so the body cannot control the concentration of glucose in the blood correctly
what can nicotine do to the body? (2)
addictive
damage blood vessels
what can tar do to the body? (3)
tooth decay
alveoli damage
increase disease
what can carbon monoxide do to the body? (2)
stops haemoglobin from carrying O2
start carrying carbon monoxide instad if oxygen
why does alcohol effect the brain?
affects the way nerve cells in the brain work and cells become damaged
how is cancer caused?
when mitosis goes wrong and cells begin to divide uncontrollably and unusual growth appear called tumors
what are characteristics of benign tumors? (3)
cannot spread
contained in one area
don’t invade
what are characteristics of malignant tumors? (3)
can spread
invade neighbouring tissues
can be caused by lifestyle or genes
