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

Integumentary System: Thermoregulation

Anatomy & Physiology

5. Integumentary System

Integumentary System: Thermoregulation

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Multiple Choice

How does vasodilation of dermal blood vessels help to decrease body temperature?

By decreasing blood flow to the skin, conserving body heat.

By increasing blood flow to the skin, allowing more heat to be released.

By increasing the production of sweat, which cools the body through evaporation.

By constricting blood vessels, reducing heat loss from the skin.

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Verified step by step guidance

Understand the concept of vasodilation: Vasodilation is the widening of blood vessels, which increases blood flow. In the context of dermal blood vessels, this process is crucial for thermoregulation.

Recognize the role of blood flow in heat exchange: When blood vessels in the skin dilate, more blood flows to the surface of the skin. This increased blood flow allows more heat to be transferred from the body to the environment.

Connect vasodilation to heat release: As more blood reaches the skin's surface, the heat carried by the blood is released into the surrounding air, helping to lower the body's internal temperature.

Consider the role of sweat production: While vasodilation increases blood flow, it also often works in conjunction with sweat production. Sweat evaporates from the skin, which further aids in cooling the body.

Differentiate from vasoconstriction: Vasoconstriction is the narrowing of blood vessels, which reduces blood flow to the skin and conserves body heat. This is the opposite of vasodilation and is used by the body to retain heat in cold conditions.