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

12. The Central Nervous System

Introduction to the Central Nervous System

Anatomy & Physiology

12. The Central Nervous System

Introduction to the Central Nervous System

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Multiple Choice

All of the structures of the central nervous system originate from the __________.

neural crest

neural tube

somites

notochord

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Verified step by step guidance

Understand the question: The problem is asking about the origin of all structures in the central nervous system (CNS). The CNS includes the brain and spinal cord, so we need to identify the embryonic structure that gives rise to these components.

Review the options provided: The options are 'neural crest,' 'neural tube,' 'somites,' and 'notochord.' Each of these structures plays a role in embryonic development, but only one is directly responsible for forming the CNS.

Clarify the role of each option: The 'neural crest' gives rise to peripheral nervous system structures, such as sensory neurons and autonomic ganglia. The 'somites' form skeletal muscles, vertebrae, and dermis. The 'notochord' is a signaling structure that helps pattern the surrounding tissues but does not directly form the CNS. The 'neural tube,' however, is the embryonic structure that develops into the brain and spinal cord.

Identify the correct answer: Based on the roles of these structures, the 'neural tube' is the correct answer because it is the precursor to all CNS structures.

Conclude the reasoning: The central nervous system originates from the neural tube, which forms during neurulation in early embryonic development. This process involves the folding of the neural plate into a tube-like structure, which later differentiates into the brain and spinal cord.