cellular respiration chapter 9. 9-1: chemical pathways ok so what do we need from the food we eat?...
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Chemical energy and Food What is a calorie? 1 CALORIE = amount of energy needed to raise the temperature of 1 gram of water by 1 degree C.TRANSCRIPT
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CELLULAR RESPIRATION
CHAPTER 9
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9-1: Chemical PathwaysOk so what do we need from the food we eat?
Why glucose?Glucose stores a lot of energy.
How is energy measured in food?
What is a calorie?1 CALORIE = amount of energy needed to
raise the temperature of 1 gram of water by 1 degree C.
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Chemical energy and FoodWhat is a calorie?
1 CALORIE = amount of energy needed to raise the temperature of 1 gram of water by 1 degree C.
![Page 4: CELLULAR RESPIRATION CHAPTER 9. 9-1: Chemical Pathways Ok so what do we need from the food we eat? Why glucose? Glucose stores a lot of energy. How is](https://reader030.vdocuments.us/reader030/viewer/2022012914/5a4d1b4f7f8b9ab0599a6f4f/html5/thumbnails/4.jpg)
What is Glycolysis?Glycolysis - a series of enzyme catalyzed
chemical reactions that change glucose into different molecules
What does Glycolysis mean?“sugar breaking”
Glyco = Sugar Lysis = Breaking down
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Releasing Energy in FoodWhere does Glycolysis occur within the cell?Cytoplasm
What do cells require to perform glycolysis?ENERGY!
◦ What is the name for a process not requiring oxygen?◦ Glycolysis is an Anaerobic process
What does this tell you about the process?How do cells produce the large amounts of
energy we require for our everyday functions?
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How do cells produce energy?GLYCOLYSIS +KREBS CYCLE +ELECTRON TRANSPORT CHAIN =
CELLULAR RESPIRATION
What do we need?
Let’s Review….. What is ATP?
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GLYCOLYSIS SUMMARYone molecule of glucose broken in half produces
two molecules of pyruvic acid (PA)◦ How many Carbons are in Glucose?◦ How many Carbons are in one pyruvic acid?
Spends 2 ATP Makes a TOTAL of 4 ATP GAIN of 2 ATP
Why does the cell spend energy to begin glycolysis?
To split the Glucose molecule.
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Glycolysis and NADH ProductionNAD+ is the electron carrier.
◦Nicotinamide Adenine Dinucleotide
What is the role of NAD+?◦It’s an electron carrier!
HEe- are removed and passed to NAD+2 NAD+ 2 NADH4 ATP made2 PA producedHow much energy is being made?
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Glycolysis Animation
http://highered.mheducation.com/sites/0072507470/student_view0/chapter25/animation__how_glycolysis_works.html
Take the QUIZ on a half a sheet of paper.
Give the other half sheet of paper to your neighbor.
Name and Date
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Energy and Pyruvic AcidWhat is the role of NAD+ in the cell?Delivers HEe- to other processes to make ATP
NAD+ is required to continue Glycolysis.Limited in the cellQuickly fill up with HEe-
How does the cell continue making energy if oxygen is unavailable?
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FERMENTATIONFERMENTATION releases energy from food
molecules in an anaerobic environment.What does anaerobic mean?
Function of Fermentation?Converts NADH back to NAD+How does it do this?Passes electrons back to Pyruvic Acid
TWO TYPESAlcoholic and Lactic Acid
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Two Brains are Better than One
Work with a partner.
Compare and contrast the alcoholic fermentation with lactic acid fermentation.
How are they similar and different?
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FERMENTATION
ALCOHOLIC LACTIC ACIDYeast and
microorganisms
PA + NADH Ethyl Alcohol + CO2 + NAD+
Why does bread dough rise?
Performed in most other cells
PA + NADH Lactic Acid + NAD+
Why do your muscles burn when engaging in strenuous activity?