Name______________________________

Period_____

4.3 Guided Reading

Cellular Respiration

As you carefully read through the text, answer the following questions as completely as possible!

Introduction

1. What must happen to food before our cells can use the energy stored within it?

2. What is cellular respiration? Explain.

3. During cellular respiration, glucose and _______________________ and are converted into ______________, carbon dioxide, and _____________________.

4. What is ATP?

The Process of Cellular Respiration

5. During cellular respiration, _______________________ is broken down in the cytoplasm of the cells and then transported to the _________________________. The mitochondria are known as the energy ______________________________ of the cells.

6. Inside the mitochondria, the “broken-down” glucose is broken down again to release ___________________.

7. ___________________ is needed to help the process of turning glucose into ATP.

8. Most of the reactions of cellular respiration are carried out in the _____________________________.

The Reactants

9. _____________________ and __________________ are both reactants in the process of cellular respiration.

10. Oxygen enters the body when an organism ________________________.

11. Glucose enters the body when an organism _________________.

The Products

12. The main product of cellular respiration is _____________.

13. Waste products of cellular respiration include ____________________________ and __________________.

14. Carbon dioxide is transported from your mitochondria out of your cell, to your ________ blood cells, and back to your _____________ to be exhaled.

The Chemical Reaction

15. The overall chemical reaction for cellular respiration is ____ molecule of glucose (C6H12O6) and ____ molecules of oxygen (O2) produces ____ molecules of carbon dioxide (CO2) and ____ molecules of water (H2O).

16. Write the entire chemical equation for cellular respiration.

Connecting Cellular Respiration and Photosynthesis

17. The equation for cellular respiration is the exact ____________________ of photosynthesis.

18. While water is broken down to form oxygen during ________________________, in __________________________________ oxygen is combined with hydrogen to form water.

19. While ___________________________ requires carbon dioxide and releases oxygen, __________________________________ requires oxygen and releases carbon dioxide.

Fermentation

20. Sometimes cellular respiration is anaerobic, meaning occurring in the absence of ___________________________.

21. What is fermentation? Explain.

22. What is alcoholic fermentation? What can it be used to make?

23. What causes bread to rise? Explain.

24. When living things carry our lactic acid fermentation, ______________________________ is the waste product.

25. What causes your muscles to become sore after exercise? Explain.

26. What causes tooth decay? Explain.