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 layer of the skin is primarily responsible for protecting against harmful ultraviolet radiation from the sun?

Hypodermis

Epidermis

Dermis

Subcutaneous layer

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Verified step by step guidance

Understand the structure of the skin, which consists of three main layers: the epidermis, dermis, and hypodermis (also known as the subcutaneous layer).

Recognize that the epidermis is the outermost layer of the skin and serves as the primary barrier against environmental factors, including ultraviolet (UV) radiation.

Learn that the epidermis contains specialized cells called melanocytes, which produce melanin, a pigment that absorbs and dissipates UV radiation, thereby protecting deeper layers of the skin.

Note that the dermis, located beneath the epidermis, provides structural support and houses blood vessels, nerves, and glands, but does not primarily protect against UV radiation.

Acknowledge that the hypodermis, or subcutaneous layer, is primarily involved in insulation and cushioning, rather than UV protection. Therefore, the epidermis is the layer responsible for protecting against harmful UV radiation.