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

A carotid massage primarily stimulates which component of the autonomic nervous system?

Somatic nervous system

Sympathetic nervous system

Parasympathetic nervous system

Enteric nervous system

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Verified step by step guidance

Understand the role of the carotid sinus: The carotid sinus is a baroreceptor located in the carotid artery that detects changes in blood pressure. When stimulated, it sends signals to the brain to regulate cardiovascular function.

Identify the autonomic nervous system components: The autonomic nervous system has two main branches—sympathetic and parasympathetic. The sympathetic system generally increases heart rate and blood pressure, while the parasympathetic system decreases them.

Analyze the effect of a carotid massage: A carotid massage applies pressure to the carotid sinus, mimicking high blood pressure. This triggers the baroreceptor reflex, which activates the parasympathetic nervous system to lower heart rate and blood pressure.

Eliminate incorrect options: The somatic nervous system controls voluntary movements and is not involved in autonomic regulation. The sympathetic nervous system increases heart rate, which is opposite to the effect of a carotid massage. The enteric nervous system regulates gastrointestinal functions and is unrelated to this process.

Conclude the correct answer: Based on the physiological response, the carotid massage primarily stimulates the parasympathetic nervous system to decrease heart rate and blood pressure.