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

Sympathetic Nervous System

Anatomy & Physiology

14. The Autonomic Nervous System

Sympathetic Nervous System

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Multiple Choice

Sympathetic nerve stimuli are responsible for the release of which of the following substances?

Norepinephrine

Serotonin

Insulin

Acetylcholine

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Verified step by step guidance

Understand the role of the sympathetic nervous system: The sympathetic nervous system is part of the autonomic nervous system and is responsible for the 'fight or flight' response. It prepares the body to respond to stress or danger by increasing heart rate, dilating airways, and mobilizing energy stores.

Identify the neurotransmitters associated with the sympathetic nervous system: The primary neurotransmitter released by postganglionic sympathetic neurons is norepinephrine. This neurotransmitter acts on adrenergic receptors to elicit physiological responses.

Differentiate between the substances listed: Serotonin is primarily involved in mood regulation and is not released by sympathetic nerve stimuli. Insulin is a hormone secreted by the pancreas to regulate blood sugar levels and is unrelated to sympathetic nerve activity. Acetylcholine is the neurotransmitter released by preganglionic neurons in both the sympathetic and parasympathetic systems, but it is not the primary neurotransmitter of postganglionic sympathetic neurons.

Focus on norepinephrine: Norepinephrine is the correct answer because it is the substance released by postganglionic sympathetic neurons to activate adrenergic receptors in target tissues during sympathetic stimulation.

Conclude the reasoning: Based on the physiological role of the sympathetic nervous system and the neurotransmitters involved, norepinephrine is the substance released in response to sympathetic nerve stimuli.