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BW • If you were hiking up on Mt. Lemmon and realized a mountain lion was stalking you (and yes, there are mountain lions up there, which can weigh up to 300 lbs and be 9 feet long), how does oxygen from the air reach the muscles in your legs, hopefully in time to get away from this large predator that wants to eat you for lunch? • Why do your leg muscles need oxygen?
In case you didn’t believe me… • I do NOT promote hunting, but this image shows how big mountain lions can get.
Announcements • Upcoming Science Fair due dates • 12/6 – Poster components • 12/13 – Final poster • If you weren’t here for the TEST yesterday you need to come take it outside of class time BEFORE THANKSGIVING.
Science Fair Update – On a half sheet of paper. • In 2 – 3 sentences, describe what you have accomplished on your project so far – be honest!! • In 2 – 3 sentences, describe what you plan to do in the next 2 weeks. Write Conclusion over Thanksgiving Break- we will be in computer lab typing on MONDAY.
Objective for the day • By the end of class, you will be able to diagram the inputs and outputs of cellular respiration.
We all know that animals breathe… • But do other organisms breathe as well? • What is an example of another organism that breathes?
Cellular Respiration All living things respire!
Respiration has two parts • Breathing • Cellular respiration
Essential Question • Why do all living things respire?
3 minutes = 180 seconds Take out a piece of paper and your notebook Title the paper “Cellular Respiration Key Terms” and copy down the words on the left, leaving a space after each term. Title your notes“Cellular Respiration”. On your slate, how many of the 14 terms do you already recognize? Try to define some of them. Cellular Respiration Key Terms • C6H12O6 • O2 • CO2 • ATP • Autotroph • Heterotroph • Cellular Respiration • Mitochondrion(a) • Cristae • matrix • glycolysis • Calvin Cycle • Krebs cycle • Electron Transport Chain
Put your key terms behind your notebook for now… …we will use them later Take notes as needed in your notebook
Autotrophs vs. Heterotrophs • Autotrophs- They make their own food. • Heterotrophs- They must get their food from somewhere else. One makes its own food, The other gets its energy from eating other organisms, Which is which? Which are we?
Chemical Reactions • We use chemical reactions to break down our food. • What are some other chemical reactions you know about?
Volcano! NaHCO3 + HC2H3O2 → CO2 +NaC2H3O2 + H2O
Reactants vs. Products Reactants – what goes in (to a chemical reaction) Products – what comes out (of a chemical reaction)
THE Cellular Respiration Reaction REACTANTS PRODUCTS
ATP = Adenosine TriPhosphate • ATP is the energy carrier for the cell Some Uses Muscle Contraction Endocytosis DNA & Protein Synthesis Cell-to-cell communication Some Uses Flashlights Automatic Fish feeders Remote controls Clocks
Cellular Respiration The release of chemical energy, from food, for use by cells.
Where do all these chemicals come from and go to? (Teams of 4) • Glucose – from food • Oxygen – from air • Water – goes where ever it wants • Carbon Dioxide – to air • Energy (ATP) – to cells
Mid-Closure • Copy this equation into your notes (if you haven’t already) and sketch where each input comes from and where each output goes to. • Then, use your notes to write short summaries for as many of the key terms as possible.
The breakdown of glucose molecules to release energy. Takes place in ALL living things. It occurs in three steps- Glycolysis, Krebs cycle, and electron transport chain Cellular Respiration Basics
Where do you think cell respiration occurs? • Hint- what is the power house of the cell?
Cytosol = Cytoplasm • Show Flash Videos: • Cellular Respiration Overview • Glycolysis • Citric Acid Cycle • Electron Transport Chain
