CELLULAR RESPIRATION

INTRODUCTION All cells must have energy to function. Glucose is a cell’s source of energy. In other words, glucose is cell food. Glucose is often stored in organisms as a carbohydrate called starch.

INTRODUCTION Many glucose molecules link together in order to from one starch molecule. In order to use starch, cells must break it down into the smaller glucose molecules.

INTRODUCTION Usable chemical energy is stored in the bonds of glucose molecules. Cells can release energy in 2 basic processes: Cellular respiration and Fermentation.

CELLULAR RESPIRATION In cellular respiration, cells use oxygen to release energy stored in the bonds of glucose molecules. Most of the energy used by the cells in your body is provided by cellular respiration.

LOCATION Cellular respiration takes place in organelles called mitochondria. Both plant cells and animal cells contain mitochondria, so both plant and animal cells release energy through cellular respiration.

A CHEMICAL CHANGE Reactants Glucose (C6H12O6) from food Oxygen (O2) from the air

A CHEMICAL CHANGE Chemical Reaction Glucose molecules in the cytoplasm are broken down into smaller molecules. These smaller molecules enter the mitochondria along with oxygen, where they recombine to form new substances

A CHEMICAL CHANGE Products Energy – some transferred to other molecules and sent to areas of the cell that need it; some released as heat. Carbon Dioxide (CO2) – released into the air Water (H2O) used by the organism

THE EQUATION Glucose + Oxygen Energy + Water + Carbon Dioxide

PUTTING IT ALL TOGETHER CARBON DIOXIDE GLUCOSE MITOCHONDRION ENERGY OXYGEN WATER

Cellular Respiration Review

What type of cell performs cellular respiration? Plant cells Animal cells Both plant and animal cells 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

Why do plant and animal cells perform cellular respiration? To release energy stored in glucose molecules To release energy stored in water molecules To release oxygen and glucose 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What part of plant and animal cells does cellular respiration occur in? Chloroplasts Mitochondria Nucleus 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What does a cell need for cellular respiration? Carbon dioxide and water Oxygen and water Glucose and oxygen 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

What is produced during cellular respiration? Usable energy, carbon dioxide and water Usable energy and water Usable energy, carbon dioxide and glucose 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30