Table of contents

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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 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

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 is released by all somatic motor neurons at their synapses and always has an excitatory effect on skeletal muscle?

norepinephrine

adrenaline

acetylcholine

endorphin

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Verified step by step guidance

Identify the role of somatic motor neurons: Somatic motor neurons are responsible for transmitting signals from the central nervous system to skeletal muscles, causing them to contract.

Understand the neurotransmitter involved: Neurotransmitters are chemical messengers that transmit signals across a synapse from one neuron to another 'target' neuron, muscle cell, or gland cell.

Recognize the specific neurotransmitter for skeletal muscles: Acetylcholine is the neurotransmitter released by all somatic motor neurons at their synapses with skeletal muscle fibers.

Determine the effect of acetylcholine: When acetylcholine is released at the neuromuscular junction, it binds to receptors on the muscle cell membrane, leading to muscle contraction.

Conclude the excitatory nature: Acetylcholine always has an excitatory effect on skeletal muscle, meaning it stimulates the muscle to contract.