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

24. Metabolism and Nutrition

Essential Amino Acids

Anatomy & Physiology

24. Metabolism and Nutrition

Essential Amino Acids

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Multiple Choice

Which characteristic makes nine amino acids 'essential'?

They are the only amino acids that can be used to build proteins.

They are synthesized in the liver and stored in muscles.

They are the most abundant amino acids in the human body.

They cannot be synthesized by the human body and must be obtained from the diet.

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Verified step by step guidance

Understand the concept of 'essential' amino acids: Essential amino acids are those that cannot be synthesized by the human body and must be obtained through dietary sources.

Recognize that there are 20 standard amino acids used by the body to build proteins, but only nine of these are considered essential.

Consider the options given: The first option suggests exclusivity in protein building, which is incorrect as all amino acids contribute to protein synthesis.

Evaluate the second option: It mentions synthesis in the liver and storage in muscles, which is not applicable to essential amino acids as they cannot be synthesized by the body.

Analyze the third option: It states that essential amino acids are the most abundant, which is misleading. The correct characteristic is their dietary necessity due to the body's inability to synthesize them.