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?
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.
Homework Response/Check D
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
Element Substance that cannot be broken down into simpler substances. Example: carbon.
The most common elements in living things are: Carbon Oxygen Hydrogen Nitrogen
Atom The smallest unit of an element
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.
Compounds
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)
Four most important groups of organic compounds found in living things are: Carbohydrates Lipids Proteins Nucleic Acids
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
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
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
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)
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