1. “Are we really what we eat
“Are we really what we eat?” “Where does the ‘stuff’ that makes us come from?”
-macromolecules

2. Compounds Inorganic: compound that does NOT have carbon
Organic: compound that HAS carbon

3. Sources of Food Autotrophs make their own food but....
We are heterotrophs so we need to get our food from other organisms
What are some autotrophs we eat?
Other heterotrophs?

4. Why Do We Need To Eat Food?
Energy
8 characteristics of living things “obtain energy and materials from other organisms”
Provide our bodies with materials to grow

5. So How Does a Cheeseburger Give Us Energy?
Digestion: Breaks food down into molecules that our bodies can use
Our Stars:
Carbohydrates
Lipids/ Fats
Proteins

6. Can you identify these macromolecules?

7. Carbohydrates
Function: Main source of energy for the body

8. Men’s World Record Marathon:
2h 03:38 Patrick Makau  Kenya 25 September 2011 Berlin
Women’s World Record Marathon:
2h15:25 Paula Radcliffe  United Kingdom 13 April 2003 London

9. Carbohydrates
Variety of Forms:
Sugars
Glucose
Fructose
Lactose
Starch

10. Carbohydrates
Diet:
Fruits
Pastas
These sugars and starches are the carbs that give us energy
They are made up of many parts called monosaccharides

11. Carbohydrate Examples
Glucose: the main source of energy in the body.
Made from photosynthesis

12. Carbohydrate Examples:
Glycogen: stored in liver and muscle cells, and is a secondary long-term energy storage

13. Carbohydrate Examples:
Starch: a stored form of energy

14. Carbohydrate Examples:
Cellulose: a chain of sugar molecules that gives the cell wall in plants their strength

15. Carbohydrates
Recap: Carbs like sugar (glucose) and starches are our main source of energy. These carbs are made up of smaller units called monosaccharides, and can be found in foods such as pasta and fruit.

16. Lipids/ Fats A calorie is a unit of energy
When we eat more calories than we burn, the extra energy is stored as what?
Fat
Function: lipids are a way to store energy in the body

17. Lipids/ Fats
Variety of Forms
Fats
Oils
Waxes

18. Lipids/ Fats
Diet:
Oils (Olive Oil)
Fats (animal fat)
Subunits: Lipids are made up of many parts called fatty acids.

19. Saturated vs. Unsaturated Fats
Why one type is better for you.....

20. Saturated Fats: have no bends in their chains so they are solid at room temperature.

21. Unsaturated Fat: bends in chain make this a liquid at room temperature

22. Phospholipids: molecule that makes up the cell membrane

23. Steroids: a type of lipid (ex. cholesterol)

24. Lipids/ Fats
Recap: Lipids like fats, oils, and waxes are another source of energy. These lipids are made up of smaller units called fatty acids, and can be found in foods such as olive oil or butter.

25. Proteins Functions: Form muscles Control reactions
Help move substances into cells

26. Proteins Variety of forms: Enzymes: control reactions Hormones
hemoglobin

27. Proteins Diet: Subunits: Meats Nuts
Proteins are made up of many parts called amino acids.

28. Proteins
Recap: Proteins like enzymes, hemoglobin, and hormones help control reactions and create muscle. These proteins are made up of smaller units called amino acids, and can be found in foods such as meats and nuts.
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29. Nucleic Acids Another type of macromolecule Functions:
But this one does not come directly from your diet
Functions:
stores your genetic information
Provides instructions for making new cells

30. Nucleic Acids Variety of Forms Subunits: DNA RNA
Nucleic acids are made up of many parts called nucleotides.

31. Nucleic Acids
Recap: Nucleic acids like DNA and RNA store genetic information. These nucleic acids are made up of smaller units called nucleotides.

32. Monomers vs. Polymers Monomers: subunits
Polymers: “many parts”; a string of monomers