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

Extreme stretching of the reticular layer of the dermis results in which of the following?

Blisters

Stretch marks (striae)

Calluses

Freckles

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Verified step by step guidance

Understand the structure of the dermis: The dermis is the middle layer of the skin, located beneath the epidermis. It consists of two layers: the papillary layer (upper) and the reticular layer (lower). The reticular layer is composed of dense irregular connective tissue, which provides strength and elasticity to the skin.

Learn about extreme stretching of the dermis: When the skin is subjected to rapid or extreme stretching, such as during pregnancy, rapid weight gain, or growth spurts, the collagen and elastin fibers in the reticular layer can become damaged or torn.

Recognize the result of fiber damage: Damage to the collagen and elastin fibers leads to the formation of visible lines or scars on the skin, commonly referred to as stretch marks (striae). These marks are a direct consequence of the inability of the skin to maintain its structural integrity under extreme stretching.

Differentiate stretch marks from other conditions: Blisters are fluid-filled pockets caused by friction or burns, calluses are thickened skin due to repeated pressure, and freckles are pigmentation changes caused by melanin. None of these are related to extreme stretching of the dermis.

Conclude that stretch marks (striae) are the correct answer: Based on the anatomical and physiological understanding of the dermis, stretch marks are the result of extreme stretching of the reticular layer.