Photosynthesis and Respiration Photosynthesis CO 2 H 20

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Photosynthesis and Respiration

Photosynthesis and Respiration

Photosynthesis CO 2 + H 20 C 6 H 12 O 6 + O

Photosynthesis CO 2 + H 20 C 6 H 12 O 6 + O 2

Energy…. • Purpose = make energy • Sunlight energy chemical energy

Energy…. • Purpose = make energy • Sunlight energy chemical energy

Plant Color • Plants absorb & use blue, indigo, violet, and red light. •

Plant Color • Plants absorb & use blue, indigo, violet, and red light. • Green light is reflected

Bonds & Energy • Energy stored in bonds of sugars (like glucose) and starches

Bonds & Energy • Energy stored in bonds of sugars (like glucose) and starches • Breaking bonds releases energy C X– C = Energy

Photosynthesis requires pigments… • Chlorophyll- pigment (green) • Chlorophyll in chloroplasts • Pigments can

Photosynthesis requires pigments… • Chlorophyll- pigment (green) • Chlorophyll in chloroplasts • Pigments can also be * yellow * orange (fall leaves) * red (tomatoes)

In summary…. . • We eat plants to get energy (or we eat animals

In summary…. . • We eat plants to get energy (or we eat animals that ate plants to get energy) • Our energy comes from plants • The ultimate energy source is the SUN

Cellular Respiration Equation C 6 H 12 O 6 + 6 O 2 6

Cellular Respiration Equation C 6 H 12 O 6 + 6 O 2 6 CO 2 + 6 H 2 O + ATP Purpose: Use Energy

 • • Respiration = cellular respiration Glucose ATP = Usable Energy Both plants

• • Respiration = cellular respiration Glucose ATP = Usable Energy Both plants and animals use cellular respiration • Breathing cells get oxygen • Eating cells get glucose

 • Respiration can be: O 2 anaerobic = O 2 – aerobic =

• Respiration can be: O 2 anaerobic = O 2 – aerobic = – Ø • BOTH produce

Glycolysis • Glucose breaking • NO oxygen- Anaerobic • Makes a little ATP Glucose

Glycolysis • Glucose breaking • NO oxygen- Anaerobic • Makes a little ATP Glucose

Glycolysis is Just the Beginning… Glucose will be broken down more to release more

Glycolysis is Just the Beginning… Glucose will be broken down more to release more

Aerobic Pathway • Krebs Cycle & Electron Transport Chain (ETC) • Requires O 2

Aerobic Pathway • Krebs Cycle & Electron Transport Chain (ETC) • Requires O 2 • If oxygen is not available, then it will NOT occur • Produces buckets of ATP! • It is the pathway of choice b/c it produces so much energy

Anaerobic Pathway (Fermentation) • • Requires NO oxygen Produces a little ATP Used only

Anaerobic Pathway (Fermentation) • • Requires NO oxygen Produces a little ATP Used only when necessary Alternative to the aerobic pathway

Lactic Acid Fermentation • Makes lactic acid • Lactic acid buildup burning in muscles

Lactic Acid Fermentation • Makes lactic acid • Lactic acid buildup burning in muscles during a strenuous workout • Large muscles run out of oxygen • Fermentation starts to try and get the ATP muscles need

 • • • Alcoholic Fermention Occurs in yeast cells Produces alcohol Important to

• • • Alcoholic Fermention Occurs in yeast cells Produces alcohol Important to bakers & brewers CO 2 is released by yeast CO 2 causes bubbles of sparkling wine & beer

Respiration Overview

Respiration Overview

Obtaining energy from foods. . • More than glucose is needed diet • Complex

Obtaining energy from foods. . • More than glucose is needed diet • Complex carbohydrates must be broken down into simple sugars • Remember all carbohydrates are chains of simple sugars • The cell can burn multiple energy sources like a furnace burns different fuels

Autotrophs vs. Heterotrophs • Autotrophs make their own food • Heterotrophs must obtain their

Autotrophs vs. Heterotrophs • Autotrophs make their own food • Heterotrophs must obtain their energy from other organisms • Plants are autotrophs • People and animals are heterotrophs Autotroph Heterotroph

Photosynthesis & Respiration • Two sides of the same coin • Photosynthesis makes deposits

Photosynthesis & Respiration • Two sides of the same coin • Photosynthesis makes deposits in the “energy bank” • Respiration makes withdrawals • The equations are opposites of one another

Overview

Overview