Photosynthesis Respiration Overview of photosynthesis and respiration SUN

Photosynthesis & Respiration

Overview of photosynthesis and respiration SUN RADIANT ENERGY PHOTOSYNTHESIS GLUCOSE RESPIRATION ATP(ENERGY) CELL ACTIVITIES

EQUATION FOR PHOTOSYNTHESIS WATER 6 CO 2 + 6 H 2 O + ENERGY CARBON DIOXIDE OXYGEN C 6 H 12 O 6 + GLUCOSE 6 O 2

EQUATION FOR RESPIRATION CARBON DIOXIDE GLUCOSE C 6 H 12 O 6 + 6 O 2 OXYGEN ATP 6 CO 2 + 6 H 2 O + ENERGY WATER

What is Photosynthesis? The process of photosynthesis is a chemical reaction. It is the most important chemical reaction on our planet.

What is the Equation for the Chemical Reaction of Photosynthesis?

What is the equation for the chemical reaction of photosynthesis?

What is the equation for the chemical reaction of photosynthesis? Six molecules of carbon dioxide react with six molecules of water to form 1 molecule of glucose and six molecules of oxygen.

Describe Photosynthesis

Describe Photosynthesis • The process of changing light energy to chemical energy • Energy stored as sugar • Occurs in plants and some algae • Plants need light energy, CO 2, and H 2 O • Takes place in the chloroplasts, using chlorophyll, the green pigment in plants

http: //www. slideshare. net/sbishop 2/b 23 photosynthesis

What happens during photosynthesis? https: //coordinatedscience 1. wordpress. com/lessons/unit-5 energy-in-plants-and-animals/5 -2 -the-leaf-and-photosynthesis/

What happens during photosynthesis? • Plants capture light energy and use that energy to make glucose • Sunlight provides the energy needed by chlorophyll to change molecules of carbon dioxide and water into glucose • Oxygen is also released in this reaction

What happens during photosynthesis? • Carbon dioxide enters the leaf through holes called stomata • CO 2 combines with the stored energy in the chloroplasts through a chemical reaction to make glucose • The sugar is moved through tubes in the leaf to the roots, stems and fruits of the plants • Some of the sugar is used right away by the plant for energy; some is stored as starch; and some is built into plant tissue

Why is this important to us?

Why is this important to us? We cannot make our own food (glucose, energy), we must get our food from plants. Plants are the first step in the food chain.

Why is this important to us? The oxygen released during photosynthesis is necessary for all living things.

Learn more about photosynthesis at: http: //www. ftexploring. com/me/photosyn 1. html

What is Cellular Respiration?

What is Cellular Respiration? The release of chemical energy for use by cells.

What is Cellular Respiration? Once the energy that was in sunlight is changed into chemical energy by photosynthesis, an organism has to transform the chemical energy into a form that can be used by the organism. This process is cellular respiration.

Describe Cellular Respiration

Describe Cellular Respiration • The breakdown of glucose molecules to release energy • Takes place in all living things • Is a step by step process

What is the chemical equation for cellular respiration?

What is the chemical equation for cellular respiration?

Cell Energy: • Cells usable source of energy is called ATP • ATP stands for adenosine triphosphate

Read how photosynthesis & respiration are related: http: //www. usoe. k 12. ut. us/curr/science/scib er 00/8 th/energy/sciber/photosyn. htm

Cellular Respiration (anaerobic) • What happens when cells don’t have enough oxygen? • Some organisms live in an oxygen-free environment. How do they get their energy?

Anaerobic Respiration: occurs when no oxygen is available to the cell (2 kinds: Alcoholic and Lactic Acid) • Also called fermentation • Much less ATP produced than in aerobic respiration

Anaerobic Respiration Fermentation • Breathing provides enough oxygen for your body to carry out normal activities. • When you are conducting a high level of activity, breathing doesn’t supply enough air for your cell’s activities.

Cellular Respiration (anaerobic) • Anaerobic respiration is also called fermentation, or the process by which energy is released from glucose when oxygen is NOT available. • This process allows organisms to continue to produce energy until oxygen is available. • However, this process only releases 2 ATP per molecule of glucose.

Anaerobic Respiration • Lactic Acid Fermentation – Muscle fatigue • When your muscle cells require more energy than can be produced • Lack of oxygen • Lactic acid build up = muscle fatigue • When oxygen is present, lactic acid breaks down • Fermentation does not produce ATP but allows cellular respiration to continue

Alcoholic Fermentation • Anaerobic way of converting energy for yeast and other microorganisms • Glucose broken down to produce alcohol, CO 2 and energy (ATP) • C 6 H 12 O 6 ethanol + CO 2 + 2 ATP • EX: baking bread with yeast fermenting wine & beer

Fermentation - Bread • • Source of sugar? DOUGH! (sugar and/or flour) Yeast use up the O 2 and ferment sugar Produce CO 2, which is trapped within tiny bubbles & results in the dough rising • Produce ethanol, which evaporates in the baking process

Alcoholic Fermentation • • Process by some bacteria and yeast. Why? They also need to produce energy Evidence: CO 2 gas (causes bread dough to rise)

Fermentation • Bacteria that rely upon fermentation play a very important role in digestive systems of animals. • They break down molecules by taking undigested material for their needs. • Without these bacteria we’d be unable to fully digest food.