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

14. The Autonomic Nervous System

Introduction to the Autonomic Nervous System

Anatomy & Physiology

14. The Autonomic Nervous System

Introduction to the Autonomic Nervous System

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Multiple Choice

Each of the following factors would increase peripheral resistance except:

Decreased vessel diameter

Increased sympathetic nervous system activity

Increased blood viscosity

Vasodilation of arterioles

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Verified step by step guidance

Step 1: Understand the concept of peripheral resistance. Peripheral resistance refers to the resistance to blood flow in the blood vessels, primarily influenced by vessel diameter, blood viscosity, and the activity of the sympathetic nervous system.

Step 2: Analyze the effect of vessel diameter on peripheral resistance. According to Poiseuille's law, resistance is inversely proportional to the fourth power of the vessel radius. A decrease in vessel diameter (vasoconstriction) increases resistance, while an increase in diameter (vasodilation) decreases resistance.

Step 3: Examine the role of the sympathetic nervous system. Increased sympathetic activity typically causes vasoconstriction, which reduces vessel diameter and increases peripheral resistance.

Step 4: Consider the impact of blood viscosity. Higher blood viscosity (thicker blood) increases resistance because it makes it harder for blood to flow through vessels.

Step 5: Identify the exception. Vasodilation of arterioles increases vessel diameter, which decreases peripheral resistance, making it the correct answer as the factor that does not increase peripheral resistance.