DO NOW

•How does our body make energy?

•List some of the key ingredients needed to create energy in our bodies.

CELLULAR RESPIRATION

OBJECTIVES

• SWBAT define Riboflavin and Niacin.

• SWBAT identify the inputs and outputs of glycolysis.

NADH AND FADH2

• FADH2 (Riboflavin)

• FADH2 FAD + 2 H+ + 2e-• B2 Vitamin • Accepts 2 electrons

• NADH (Niacin)

• NADH NAD+ + H+ + 2e-• B3 Vitamin • Accepts 2 electrons

THE BASIC STEPS OF CELLULAR RESPIRATION

Step 1: Glycolysis (anerobic)

Step 2: Krebs Cycle (aerobic)

Step 3: Electron Transport Chain

(aerobic)

CELLULAR RESPIRATION OCCURS IN TWO MAIN PARTS.

Glycolysis

Aerobic Respiration

Anaerobic Respiration

LET’S TRY SOME SAMPLE MATH PROBLEMS BEFORE WE BEGIN

• Spongebob Squarepants is selling Krabby Patties. He spends $2 to make each one, and is selling them for $7 dollars each. How much NET profit is Spongebob making if he sells 1 Krabby Pattie?

• 10 Krabby Patties?

SMARTNOTEBOOK

DO NOWClick icon to add picture

• Where does glycolysis take place?

• What is the total net gain of ATP from glycolysis?

• (P.S We’re changing seats today! Yay!)

DO NOW

• 1. If 28 ATP were made in glycolysis, how many glucose molecules were consumed?

• 2. Where does the carbon in carbon dioxide come from?

• 3. In glycolysis, if 18 NADH are produced, how many ATP are produced?• How many glucose molecules are consumed?• How many Pyruvate molecules are produced?

DO NOW

• What happens to the carbons in Pyruvate during the Kreb’s Cycle?• Where does the Kreb’s Cycle take place?• What are the NET total outputs for the Kreb’s Cycle? • Why are they twice as much as the total outputs?

SOOO….

Why do we breathe oxygen??? We take in oxygen as other forms. Ex. water (H20). BUT WHY MUST WE BREATHE IN OXYGEN GAS????

DO NOW

• What happens when we don’t get enough oxygen?

• What does our body do?

OBJECTIVES

• SWBAT compare and contrast alcohol fermentation and lactic acid fermentation.

• SWBAT design an experiment to try to maximize the amount CO2 produced from fermentation.

STAND UP!

• Move your arm up and down for three minutes!

• Do not stop until the time is up!?

• What is happening in your arm?

BIOLOGICAL PROCESSES REQUIRE…

ENERGY• Moving your arms, like other biological processes, requires energy.

• The energy needed is provided by the breakdown of sugars in food to form ATP (cellular respiration)

• CR requires Oxygen, but after some time cells are unable to provide the needed amount of oxygen, and lactic acid fermentation occurs.• When lactic acid builds up, the muscles feel sore and fatigued.

WHAT IS THE DIFFERENCE?Anaerobic - Does not require OxygenAerobic - Does require Oxygen

LACTIC ACID FERMENTATION Physical conditioning

allows your body to adapt to increased activity

– The body can increase its ability to deliver oxygen to muscles

Long-distance runners wait until the final sprint to exceed their aerobic capacity

LACTIC ACID FERMENTATION

• Lactic acid is associated with the “burn” associated with heavy exercise

• If too much lactic acid builds up, your muscles give out

LACTIC ACID FERMENTATION

• Inputs:• 2 Pyruvates, 2 NADH

• Outputs:• 2 lactic acid, 2 NAD+

• Ex:• Bacteria that help in making

yogurt.• Human muscle cells when out of

oxygen.

ANAEROBIC RESPIRATION

• Yeast, People, Bacteria, Fungus

• Making ATP without oxygen

• Used to make beer, wine, and bread

BREAD AND ALCOHOLIC BEVERAGES• Use Yeast

• Carbon dioxide is produced and ethanol• http://www.microbiologybytes.com/video/Scerevisiae.html

ALCOHOL FERMENTATION

• Inputs:• 2 Pyruvates, 2 NADH

• Outputs:• 2 ethanol, 2 CO2, 2 NAD+

• Ex:• Yeast in wine and beer

production.

WHY DON’T YOU GET DRUNK OFF BREAD?

Take a minute and pair up with the person sitting NEXT to you and discuss this question.

AEROBIC VS. ANAEROBIC RESPIRATION

Glycolysis 2 Pyruvic Acid

Glucose

Cell Membrane

TP

O2IF

“Aerobic”

Mitochondria

“Anaerobic”

If NO 02

DO NOW

• Why do your muscles burn after you exercise?

• Do we do anaerobic or aerobic respiration?

• What are the differences between the two?

LAB – ALCOHOL FERMENTATION OF YEAST

• Yeast – have a mitochondria and can perform aerobic respiration as well.

• Yeast – do anaerobic respiration (alcohol Fermentation)

• Outputs: CO2, ATP, and Ethanol

• Sucrose= glucose and fructose

• Feedback Inhibition- too much of product stops the reaction

• Yeast- used for bread, and alcoholic beverages

DO NOW

• What is light?

• What are the different forms of light?

• What is the kind of light we can see?

DO NOW – LABEL THE AREA THIS HAPPENS

• 1. Photosynthesis 5. Cholorplast

• 2. Cellular respiration 6. Mitochondria

• 3. Glucose 7. Carbon dioxide

• 4. Oxygen

OBJECTIVES

• SWBAT compare and contrast cellular respiration and photosynthesis

• SWBAT answer questions to help them review for their upcoming test.