1. HW # 51- Revise your Essay. Warm up
Week 16, Day Two
HW # 51- Revise your Essay.
Warm up
What do lipids do for your body? What are the types of lipids?

2. Warm up Response
-Lipids are energy rich organic compounds made of carbon, hydrogen and oxygen
-They contain more energy than carbohydrates
-Cells store lipids for later use.
-Lipids also make up most of the cell membrane.

3. Homework Response/CheckD

4. Goals for Today Quick discussion on Carbs, Lipids, Proteins, etc.
Work on Essay Revision (Introduction)
Complete Chemical Compounds in Cells (and review)
Begin Study Guide

5. Element
Substance that cannot be broken down into simpler substances. Example: carbon.

7. The most common elements in living things are:
Carbon
Oxygen
Hydrogen
Nitrogen

8. Atom
The smallest unit of an element

9. A compound is two or more elements that are chemically combined.
The smallest unit of a compound is a molecule.
An example of a compound is water.

10. Compounds

11. Organic and Inorganic Compounds
Inorganic compounds do not contain carbon.
Examples: water (H2O) & table salt (NaCl).
Organic compounds contain carbon and hydrogen and are associated with living things.
Examples: (next slide)

12. Four most important groups of organic compounds found in living things are:
Carbohydrates
Lipids
Proteins
Nucleic Acids

13. Carbohydrates
Energy-rich compound made of carbon, hydrogen, and oxygen
Supply energy for cell processes; short-term energy source
Most important source of energy for body
Sugars-fruits, starch-pasta, and cellulose-found in cell walls of plants

14. Proteins
Made of elements carbon, oxygen, hydrogen, nitrogen, and sulfur
Regulate cell processes and build cell structure s
Made up of smaller molecules linked together chemically called amino acids
Enzymes speed up chemical reactions

15. Lipids Energy-rich compounds made of carbon, hydrogen, and oxygen
Store large amounts of energy long term; form boundaries around cells
Fats, oils, waxes, and cholesterol

16. Nucleic Acids
Made of the elements carbon, oxygen, hydrogen, nitrogen, and phosphorus
2 kinds of nucleic acids
DNA - Carries hereditary information (chromatin in nucleus)
RNA - used to make proteins (cytoplasm & nucleus)

17. Water and Living Things
Makes up about 2/3 of your body
Most chemical reactions in cells require water
Helps cells keep their size and shape
Helps keep temperature of cells from changing rapidly