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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 Heart2h 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

Neurotransmitters of the ANS

Anatomy & Physiology

14. The Autonomic Nervous System

Neurotransmitters of the ANS

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Multiple Choice

Which of the following neurotransmitters would be the only secretion of the sympathetic preganglionic fibers of the autonomic nervous system?

norepinephrine

acetylcholine

epinephrine

acetylcholinesterase

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Verified step by step guidance

Understand the structure of the autonomic nervous system, which is divided into the sympathetic and parasympathetic divisions. Each division has preganglionic and postganglionic fibers.

Recognize that the sympathetic division is responsible for the 'fight or flight' response, and its preganglionic fibers originate in the spinal cord.

Identify the neurotransmitter released by sympathetic preganglionic fibers. In the autonomic nervous system, preganglionic fibers, whether sympathetic or parasympathetic, release acetylcholine.

Differentiate between preganglionic and postganglionic fibers. Sympathetic postganglionic fibers typically release norepinephrine, but preganglionic fibers release acetylcholine.

Conclude that acetylcholine is the neurotransmitter secreted by sympathetic preganglionic fibers, as it is common to both sympathetic and parasympathetic preganglionic fibers.