Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart2h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

3. Energy & Cell Processes

Review of Aerobic Cellular Respiration

Anatomy & Physiology

3. Energy & Cell Processes

Review of Aerobic Cellular Respiration

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Multiple Choice

A gram of fat oxidized by respiration produces approximately twice as much ATP as a gram of carbohydrate. Which of the following best explains this observation?

Fats are produced when cells take in more food than they need.

Fats are less soluble in water than sugars.

Fats do not form true macromolecules as sugars do.

Fats are closely related to lipid molecules, which are the basic building blocks of cellular membranes.

Fats are better electron donors to oxygen than are sugars.

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Verified step by step guidance

Understand the basic concept of cellular respiration: Cellular respiration is the process by which cells convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. The main substrates for cellular respiration are carbohydrates and fats.

Recognize the role of electron donors in ATP production: During cellular respiration, electrons are transferred from electron donors to electron acceptors (like oxygen) in a series of reactions. The efficiency of ATP production is influenced by the ability of these molecules to donate electrons.

Compare the structure and energy content of fats and carbohydrates: Fats are composed of long hydrocarbon chains, which contain many high-energy electrons. Carbohydrates, on the other hand, have a different structure with fewer high-energy electrons available for transfer.

Analyze why fats produce more ATP: Fats have more carbon-hydrogen bonds compared to carbohydrates, which means they have more electrons to donate during the electron transport chain. This results in a higher yield of ATP when fats are oxidized.

Conclude with the explanation: The statement 'Fats are better electron donors to oxygen than are sugars' is correct because the structure of fats allows them to donate more electrons, leading to increased ATP production compared to carbohydrates.