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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

The Epidermis: Layers

Anatomy & Physiology

5. Integumentary System

The Epidermis: Layers

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Multiple Choice

The largest quantities of keratin are found in the epidermal layer called the stratum:

corneum

granulosum

basale

spinosum

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Verified step by step guidance

Understand the structure of the epidermis, which consists of multiple layers: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum.

Learn the function of keratin, a protein that provides strength and waterproofing to the skin, and is produced by keratinocytes as they mature and move upward through the epidermal layers.

Recognize that keratinocytes begin producing keratin in the stratum granulosum, but the largest quantities of keratin are found in the stratum corneum, the outermost layer of the epidermis.

Understand that the stratum corneum is composed of dead keratinized cells, which form a tough, protective barrier against environmental damage and water loss.

Review the options provided and identify that the stratum corneum is the correct answer based on its role as the layer with the highest concentration of keratin.