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

4. Tissues & Histology

Introduction to Epithelial Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Epithelial Tissue

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Multiple Choice

Which cell type is found only in the stratum spinosum and stratum granulosum of the epidermis?

Keratinocyte

Merkel cell

Langerhans cell

Melanocyte

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Verified step by step guidance

Step 1: Begin by understanding the structure of the epidermis, which is composed of five layers: stratum basale, stratum spinosum, stratum granulosum, stratum lucidum (only in thick skin), and stratum corneum.

Step 2: Learn the function and location of each cell type mentioned in the problem: Keratinocytes are the primary cells of the epidermis found in all layers; Merkel cells are sensory cells located in the stratum basale; Melanocytes are pigment-producing cells also found in the stratum basale.

Step 3: Focus on Langerhans cells, which are specialized immune cells. They are dendritic cells responsible for detecting pathogens and are primarily located in the stratum spinosum and stratum granulosum.

Step 4: Understand why Langerhans cells are unique to these layers. Their position allows them to interact with keratinocytes and other immune cells to provide a defense mechanism against pathogens that penetrate the skin.

Step 5: Confirm that the correct answer is Langerhans cells, as they are the only cell type specifically found in the stratum spinosum and stratum granulosum, unlike the other cell types listed.