What two things should you do if you want to lose weight?
1. Eat less 2. Exercise often
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Why do doctors not rely simply on BMI measurements?
Because people have different proportions of muscle and fat. Muscle also weighs more than fat, therefore your BMI could not represent how much fat your body carries.
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What happens if you take in more energy than you use?
If you take in more energy than you use, the excess is stored as fat. If you eat too much over a long period of time, you will eventually become obese. To lose weight you need to eat less and exercise more.
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What is a balanced diet?
A balanced diet is a diet which includes all the nutrients in the correct amounts that the body needs to work properly.
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What is malnutrition?
Malnutrition can be either a lack or too much of a certain nutrient in your diet.
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What does the amount of energy you need depend on?
How much activity you do, your age, your sex, your body size/proportions, and the surrounding temperature
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What is a metabolic rate?
The rate at which the chemical reactions happen in the body cells.
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Why does the body need nutrients?
To permit the body to keep working properly
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What does it mean if your BMI measurement is 18.5?
It means you are underweight
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What medical problems is someone who is obese more likely to suffer from?
Heart disease, high blood pressure, diabetes, and arthritis
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Why does the body need minerals?
For the body's chemical reactions
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Why does the body need vitamins?
To prevent certain diseases
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Why does the body need water?
For chemical reactions
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What is starvation?
Starvation is when you do not have enough food over a long period of time.
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What are the causes of starvation?
War,natural disasters, pests, droughts and poverty
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What two factors affect the metabolic rate?
1. Genetic factors you inherit from your parents 2. How much exercise you do
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What is the test for protein?
Biuret - it turns blue then purple if protein is present in food
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Why do teenage girls need more iron than teenage boys?
Teenage girls are likely to have started their periods and so they loose blood during menstruation from the red blood cells. In order to replace the red blood cells, teenage girls need to intake more iron.
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Why were sailors likely to get scurvy?
Because you would be less likely to eat fruit and veg as they would not preserve for months. And as fruit and veg is eaten fresh, once the sailors had eaten them, there would be none left as there would be no supply.
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How can someone be fit but be malnourished?
They might do regular exercise but they lack or consume too much of a certain nutrient, making them fit but malnourished.
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Why do women need more energy than men?
Because men have more muscle than women and men have bigger builds than women.
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Other cards in this set
Card 2
Front
Why do doctors not rely simply on BMI measurements?
Back
Because people have different proportions of muscle and fat. Muscle also weighs more than fat, therefore your BMI could not represent how much fat your body carries.
Card 3
Front
What happens if you take in more energy than you use?
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