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 Heart3h 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

2. Cell Chemistry & Cell Components

Acids and Bases

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Acids and Bases

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Multiple Choice

Which of the following is a source of fixed acids in the body?

Carbonic acid formed from CO2 and water

Hydrochloric acid secreted by the stomach

Sulfuric acid produced from the metabolism of sulfur-containing amino acids

Lactic acid produced during anaerobic metabolism

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Verified step by step guidance

Understand the concept of fixed acids: Fixed acids are acids that do not leave the body in gaseous form and must be eliminated through the kidneys. They are produced as a result of metabolic processes.

Analyze the options provided: Carbonic acid is not a fixed acid because it is volatile and can be excreted via the lungs. Hydrochloric acid is secreted by the stomach but is not considered a fixed acid because it is part of digestive processes and not a metabolic byproduct.

Focus on sulfuric acid: Sulfuric acid is produced during the metabolism of sulfur-containing amino acids, such as methionine and cysteine. This process occurs in the liver and results in the production of fixed acids that must be excreted by the kidneys.

Consider lactic acid: Lactic acid is produced during anaerobic metabolism, such as during intense exercise. While it is an acid, it is not classified as a fixed acid because it can be metabolized back into glucose or oxidized into carbon dioxide and water.

Conclude that sulfuric acid is the correct answer: Sulfuric acid is a fixed acid because it is a metabolic byproduct that cannot be excreted in gaseous form and requires renal elimination.