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

1. Introduction to Anatomy & Physiology

Introduction to Directional Terms

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Directional Terms

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Multiple Choice

Which of the following correctly describes the location of white matter relative to gray matter in the spinal cord?

White matter and gray matter are mixed evenly throughout the spinal cord.

White matter is deep to gray matter.

White matter is superficial to gray matter.

Gray matter surrounds white matter in the spinal cord.

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Verified step by step guidance

Understand the basic structure of the spinal cord: The spinal cord is organized into two types of tissue—white matter and gray matter. Gray matter primarily contains neuron cell bodies, while white matter consists of myelinated axons that facilitate communication between different parts of the nervous system.

Visualize the cross-sectional anatomy of the spinal cord: In a cross-section, gray matter appears as a butterfly-shaped structure in the center, while white matter surrounds it. This arrangement is consistent throughout the spinal cord.

Clarify the terms 'superficial' and 'deep': In anatomical terminology, 'superficial' refers to structures closer to the surface, while 'deep' refers to structures further inside. In the spinal cord, white matter is located closer to the outer surface, making it superficial to gray matter.

Eliminate incorrect options: The option stating that white matter and gray matter are mixed evenly is incorrect because they are distinctly organized. The option stating that white matter is deep to gray matter is also incorrect because gray matter is central and white matter surrounds it. The option stating that gray matter surrounds white matter is incorrect because the reverse is true.

Confirm the correct answer: Based on the anatomical arrangement, the correct description is 'White matter is superficial to gray matter.' This matches the structural organization of the spinal cord.