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

Venoconstriction increases which of the following?

Heart rate

Respiratory rate

Venous return to the heart

Arterial blood pressure

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Verified step by step guidance

Understand the concept of venoconstriction: Venoconstriction refers to the narrowing of the veins, which is caused by the contraction of smooth muscle cells in the vessel walls. This process reduces the diameter of the veins and increases the pressure within them.

Consider the effect of venoconstriction on blood flow: When veins constrict, they push more blood back towards the heart. This is because the reduced diameter increases the pressure, which helps propel blood through the venous system.

Relate venoconstriction to venous return: Venous return is the flow of blood back to the heart. Venoconstriction increases venous return because the constricted veins push more blood towards the heart, enhancing the volume of blood returning to the heart.

Analyze the impact on arterial blood pressure: Increased venous return can lead to an increase in cardiac output, which may subsequently raise arterial blood pressure. However, the direct effect of venoconstriction is primarily on venous return rather than arterial blood pressure.

Conclude the primary effect: The main physiological effect of venoconstriction is the increase in venous return to the heart, as it directly influences the amount of blood being returned to the heart for circulation.