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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 role does the skin play in the synthesis of vitamin D?

The skin converts cholesterol into vitamin D3 using UV radiation.

The skin stores vitamin D for later use in the body.

The skin releases vitamin D directly into the bloodstream.

The skin synthesizes vitamin D from dietary sources.

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Verified step by step guidance

Understand that vitamin D synthesis in the skin is initiated by exposure to ultraviolet (UV) radiation from sunlight.

Recognize that the skin contains a cholesterol derivative called 7-dehydrocholesterol.

Learn that when the skin is exposed to UVB radiation, 7-dehydrocholesterol is converted into previtamin D3.

Know that previtamin D3 undergoes a heat-dependent transformation into vitamin D3 (cholecalciferol) within the skin.

Realize that vitamin D3 is then released into the bloodstream, where it is further processed by the liver and kidneys to become the active form of vitamin D.