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

5. Integumentary System

Introduction to the Integumentary System

Anatomy & Physiology

5. Integumentary System

Introduction to the Integumentary System

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Multiple Choice

Which of the following is NOT a protective function of the skin?

Barrier against pathogens

Protection against UV radiation

Synthesis of vitamin D

Prevention of water loss

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Verified step by step guidance

Understand the primary functions of the skin: The skin serves as a protective barrier, preventing the entry of pathogens, shielding against harmful UV radiation, and minimizing water loss from the body. It also plays a role in thermoregulation and sensory reception.

Identify the role of vitamin D synthesis: The skin is involved in the synthesis of vitamin D when exposed to sunlight (UVB radiation). This process is essential for calcium absorption and bone health, but it is not a protective function.

Differentiate between protective and non-protective functions: Protective functions of the skin include acting as a barrier against pathogens, preventing water loss, and protecting against UV radiation. Synthesis of vitamin D, while important, is a metabolic function rather than a protective one.

Analyze the options provided: Compare each option to the protective functions of the skin. 'Barrier against pathogens,' 'Protection against UV radiation,' and 'Prevention of water loss' are all protective functions. 'Synthesis of vitamin D' is not a protective function.

Conclude that the correct answer is 'Synthesis of vitamin D,' as it does not fall under the category of protective functions of the skin.