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BMR, Cholesterol and Salt

BMR, Cholesterol and Salt. Starter – BMI. Complete the written passage at the top of the sheet If you want to, you can work out your own BMI. You then need to work out the BMI of some celebrities – you have done this sheet before, but do you remember it well enough?. BMI.

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BMR, Cholesterol and Salt

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  1. BMR, Cholesterol and Salt

  2. Starter – BMI • Complete the written passage at the top of the sheet • If you want to, you can work out your own BMI. • You then need to work out the BMI of some celebrities – you have done this sheet before, but do you remember it well enough?

  3. BMI • The body mass index (BMI) is a guide to whether someone is underweight, overweight or ideal weight. • Using the weight and height of an individual, you are able to work out if that individual is of the right body mass. BMI – Body Mass Index = weight (kg) height (m)²

  4. BMR... On the other hand... • BMR stands for Basal Metabolic Rate • BMR is a measure of the amount of energy you need each day just to stay alive. • This can also be co-ordinated with your physical activity level. • It is measured in kilojoules. 11.40

  5. Basal Metabolic Rate • Metabolic rate is the rate at which your body burns calories • Basal metabolic rate (BMR) is the rate when resting • You can inherit a high BMR • You can also increase your BMR with more exercise (increasing your muscle to fat ratio)

  6. Calculating BMR • As you know... BMR stands for Basal Metabolic Rate. • It is your metabolic rate when you are resting. • If you are between 10 and 17 you can calculate it like this... Female (Body mass in KG x 0.056) + 2.898 Male (Body mass in KG x 0.074) + 2.754 This gives you your BMR in Mega joules per day. 11.50

  7. Just to be sure... • Write down, one simple sentence for each: what is BMR and what is BMI. • The two are totally different – You need to make sure you're aware of this. • You have 4 minutes to do this.

  8. Cholesterol and salt • Today we live in a society where cooking isn't always easy or necessary. • Take-aways and fast food are accessible and cheap • But... 1 small portion can give you more fat and salt than you are recommended to eat in just 1 day.

  9. Cholesterol • On the whole, cholesterol is bad for you. • Too much cholesterol can cause fatty deposits and blockages in your arteries and blood vessels which can increase the risk of heart disease. • What you eat can affect your cholesterol level.

  10. Cholesterol • Saturated fats are particularly to blame for increasing cholesterol levels. • These are the kind of fats you find in animal products – eggs, dairy products and meat. • Other types of foods and fats can help to lower your cholesterol. These are called unsaturated fats and can be found in plant oils , like sunflower oil. 12.10

  11. Is all cholesterol bad? • Cholesterol isn’t all bad... We need cholesterol to make cell membranes. • Your liver can also make cholesterol. If you have a diet high in unsaturated fats your liver will make more, if you have a diet high in saturated fats your liver will make less. • It depends on your genes as well as what you eat or how fat you are.

  12. Are you paying attention?... • Jot down at least 4 points about cholesterol from what I have just said. • Here are some key words to help you Liver saturated fats Fat Unsaturated fats Animal products Genes Arteries Blood Vessels Plant oils Sunflower oil 12.20

  13. 2 ways of carrying cholesterol • Cholesterol is carried in your blood in 2 ways: • LDL – Low density lipoproteins - Bad Cholesterol – can cause heart disease. • HDL – High density lipoproteins - Good Cholesterol – Needed in diet. It is good to have a diet high in HDL and low in LDL. Watch this... Cholesterol and blood levels

  14. Why can’t we get rid of cholesterol? • Cholesterol won’t dissolve in water so it cannot dissolve in your watery blood plasma. • It is carried around in tiny balls mixed up with protein. • These are called lipoproteins. • As you know there are 2 kinds of these – HDLs and LDLs.

  15. HDLs and LDLs • LDLs are often called “bad” cholesterol because they lead to fat building up on the artery walls – this can cause heart disease. • HDLs are known as “good cholesterol because they reduce or prevent this fat build up. You can also take statins to control your cholesterol.

  16. Statins... • Statins are drugs that lower cholesterol levels and improve the balance of HDLs to LDLs. • I have bought in a box of statins and their instructions for you to have a look at. • We also have a BBC news clip to watch.

  17. Salt • Like cholesterol, we need salt, but not too much. • Too much salt in the diet can lead to increased blood pressure. • Many processed foods can contain a lot of salt, this includes snack foods like crisps and nuts and also ready meals.

  18. Watch this... Watch this BBC News clip. Councils attack increasing salt levels But what do you think?

  19. Over to you... • Please show me what you have learnt by completing the questions on the sheet I have given you. • I expect all of you to complete all of the questions. • If you get these done, have a go at the questions in the book. 1.15

  20. Homework • Research and write, in your own words, what a statin is. • Use reliable sources, do not copy and paste. • Due next tues, wk B , 20th September.

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