1. Applied Science Unit 7: Health Applications of Life Science Lesson 1: Healthy Lifestyles

2. Unit 7: Health Applications of Life Science In this unit, you will learn about: Things that contribute to healthy living Such as: Healthy diet, exercise, measures to improve health. Preventative Measures Such as: The immune system, medical screening. Medical Treatments Such as: antibiotics, blood transfusions, stem cells.

3. Were you paying attention? What is this unit all about? Write down everything you can remember on the glass…

4. Today’s Lesson Objectives: To know the nutrients needed for a balanced diet To understand why each nutrient is needed.

5. Starter Activity Write down 3 things you ate in the last few days that were: A) Healthy B) Unhealthy

6. Follow up activity Can you explain, as fully and scientifically as possible, why those things were healthy / unhealthy? Write down your explanations

7. Class Activity Placed around the room are several food labels/boxes etc… Take 2 different ones and study the nutritional information. Write down the nutrients you find in that food. Do you know why we need each nutrient? Write down what you know about each nutrient…

8. Carbohydrates

9. Energy for respiration Source of (good) calories Releases energy slowly (to give you energy over a long period of time). Burned off when we exercise. Too much in the diet (i.e. you don’t burn it all off) can be converted to fat.

10. Fats

11. Used in the body for insulation Heat insulation / protection around organs Nerve cells and electrical conduction. Saturated fats are bad and we can live without them (burgers, chocolate, butter etc…) But we do still need fats (in small amounts) from good sources such as olive oil / low fat spread / nuts. Fats are broken down to give us energy when we run out of carbohydrates.

12. Proteins

13. Used for muscle growth and repair of cells. Obtained from meat, fish, dairy, nuts or meat substitutes such as Quorn. Excess protein is broken down in the liver and excreted in the urine (via the kidney).

14. Vitamins and minerals

15. Vitamins and Minerals These can be found in fruit and vegetables Each vitamin and mineral has a particular job to do in the body. E.g. iron helps your blood cells carry oxygen It is important to eat a variety of different fruits and vegetables to ensure you are getting all of the necessary vitamins and minerals.

16. Fibre

17. Helps to keep your intestines healthy Keeps you ‘regular’

18. NutrientFunctionExample Carbohydrates Fats Proteins Vitamins Minerals Fibre

19. Re-cap: Food nutrients: https://www.youtube.com/watch?v=8v6wcgprHXM

20. Poor Diets What can happen if a person eats too much fat in their diet?

21. Think about… Discuss in your groups, what you think might happen as a result of these diet problems: 1.Not enough protein 2.Too much sugar 3.Not enough vitamin C 4.Not enough fibre

22. Not enough protein Muscle wasting Swollen tummy

23. Kwashiorkor Deficiency of Protein in the Diet:

24. Too much sugar Rotten teeth Excess sugar (not burned off) gets turned to fat, this leads to being over weight or obese.

25. Not enough Vitamin C Problems with fighting infection Vit C is also needed to absorb iron Conditions such as scurvy

26. Scurvy Deficiency in Vitamin C

27. Not enough Fibre Constipation

28. What about extreme cases? A person who eats far too much or far too little food can have very serious health issues. Obesity Anorexia

29. Obesity

30. Anorexia

31. Adult’s GDAs:

32. Children’s GDAs

34. Misleading Diet Claims: Many Diets/Exercise plans / foods are based on science but can be misleading. Can you think of any examples?

35. The reality:

36. Supersize me!! https://www.youtube.com/watch?v=izB6WohWJPY

37. Exercise How does exercise help keep you healthy? In pairs, or small groups, write down all the ways exercise benefits your health. Make a list of all the different types of exercise you know of. Does all exercise have the same result?