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

The Epidermis: Layers

Anatomy & Physiology

5. Integumentary System

The Epidermis: Layers

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Multiple Choice

In which layer of the epidermis do keratinocytes begin to produce large amounts of keratin?

Stratum corneum

Stratum basale

Stratum spinosum

Stratum granulosum

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Verified step by step guidance

Understand the structure of the epidermis, which consists of five layers: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum. Each layer has distinct functions and characteristics.

Learn the role of keratinocytes, which are the primary cells in the epidermis. These cells produce keratin, a protein that provides strength and waterproofing to the skin.

Focus on the stratum granulosum, the third layer of the epidermis. This is where keratinocytes begin to produce large amounts of keratin and keratohyalin, which are essential for forming the skin's protective barrier.

Compare the stratum granulosum to other layers: The stratum basale is where keratinocytes are formed through mitosis, the stratum spinosum is where keratinocytes start to mature, and the stratum corneum is the outermost layer composed of dead keratinized cells.

Conclude that the stratum granulosum is the layer where keratinocytes actively produce large amounts of keratin, making it the correct answer to the question.