Homework

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Homework

• Answer the past exam questions on coronary heart
  disease and cancer.
• (We will be learning about these two topics
  today)
• Due in Friday 3rd October (Day 3, Period 5)

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• BHF animation

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Play your cards right!

http//www.youtube.com/watch?vThMIAHxdawIfeature
related
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For each picture that appears, say whether it
would HIGHER or LOWER your risk of developing CHD
or cancer
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You have been warned!
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Cancer and CHD

• Aims
• To know how lifestyle can affect your risk of
  developing some diseases
• - In particular, cancer and coronary heart
  disease (CHD)
• To understand how specific risk factors can
  contribute to (not cause!!) cancer and CHD

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How much do you already know?

• What are the differences between meiosis and
  mitosis?
• Which of these two types of cell division do you
  think is involved in cancer?
• What is the name given to an agent that causes
  cancer?
• Name the two types of tumour caused by cancer.
• How many cancer treatments do you know of?
• http//www.cancerquest.org/images/Documentary/Engl
  ish/DocInterfaceEng.swf

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Cancer Treatment

• Chemotherapy stops the cancer cells from
  replicating themselves
• Radiotherapy damages DNA so that the cell
  destroys itself
• Surgery removal of the tumour and surrounding
  tissue.

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On a lighter note!

• 80 of most cancers are curable if diagnosed
  early ?
• Science has already made vast improvements
  already in treating cancer, and continue to do so
• You are now aware of the risk factors which make
  you more susceptible to getting cancer (and CHD),
  so YOU have the choice to change your bad
  habitats now!

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CVD cardiovascular disease

• Most common form is Coronary Heart Disease (CHD)
• In economically developed countries, the main
  cause of CHD is atherosclerosis.
• http//uk.youtube.com/watch?vfLonh7ZesKs
• http//uk.youtube.com/watch?vEQVEdFSlUGU
• Complete the following activity on
  atherosclerosis

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Re-arrange the following steps into a
flow-charts, detailing how an atheroma is formed.
Then draw pictures next to certain steps showing
what a cross-section of the artery would look
like.  
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Atherosclerosis
Aneurysm
Thrombosis
(make your own notes here from my explanation)
A burst blood vessel associated with an aneurysm,
blood clot or head injury can cause a Stroke
Blockage or severe narrowing of one of the
coronary arteries that supply the heart can lead
to angina pectoris, or more severely, a
myocardial infarction
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Cholesterol

• Diet high in saturated fats causes excess
  cholesterol in blood
• Part of the fatty deposits in atheromas
• Accelerates atherosclerosis

High Blood Pressure

• Hypertension
• Excessive salt intake, saturated fats, lack of
  exercise, stress, smoking, high alcohol
  consumption
• Increased risk of damage to the artery wall
  through increased pressure
• Heart has to work harder to pump blood around
  the body could cause a myocardial infarction

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• Smoking and CHD
• CO Nicotine
• Carboxyhaemoglobin Stimulates adrenaline
• (reduced O2 capacity)
• Increased heart
• rate b.p., reduces
• arteries ability to
• dilate
• Increased risk of CHD
• stroke

RBC sticky
Increased risk of thrombosis
Heart pumps faster
Angina during exercise
Hypertension
Stroke/myocardial infarction
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True or False

• In the UK, one person has a heart attack every
  two minutes