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

A splinter penetrates to the deepest layer of the epidermis on your hand. What is this layer called?

Stratum granulosum

Stratum lucidum

Stratum basale

Stratum corneum

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Verified step by step guidance

Step 1: Understand the structure of the epidermis, which is the outermost layer of the skin. It consists of five layers arranged from superficial to deep: Stratum corneum, Stratum lucidum (only in thick skin), Stratum granulosum, Stratum spinosum, and Stratum basale.

Step 2: Recognize that the deepest layer of the epidermis is the Stratum basale, also known as the basal layer. This layer is responsible for cell division and regeneration, and it anchors the epidermis to the dermis below.

Step 3: Analyze the scenario where a splinter penetrates the skin. If it reaches the deepest layer of the epidermis, it must have passed through all the superficial layers (Stratum corneum, Stratum granulosum, etc.) to reach the Stratum basale.

Step 4: Eliminate incorrect options based on the depth of the layers. Stratum corneum is the outermost layer, Stratum granulosum is superficial to the Stratum basale, and Stratum lucidum is only present in thick skin (palms and soles). Therefore, the correct answer is Stratum basale.

Step 5: Conclude that the Stratum basale is the deepest layer of the epidermis and is the correct answer in this scenario.