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

2. Cell Chemistry & Cell Components

Introduction to the Cytoskeleton

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to the Cytoskeleton

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Multiple Choice

Which of the following statements best describes microtubules?

Microtubules are flexible structures that form the cell's outer membrane.

Microtubules are hollow tubes that provide structural support and are involved in intracellular transport.

Microtubules are composed of actin and are involved in cell motility.

Microtubules are thin filaments primarily responsible for muscle contraction.

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Verified step by step guidance

Understand the structure of microtubules: Microtubules are cylindrical structures made of tubulin proteins. They are not flexible structures forming the cell's outer membrane.

Recognize the function of microtubules: They provide structural support to the cell and are crucial for intracellular transport, helping move organelles and vesicles within the cell.

Differentiate microtubules from other cytoskeletal elements: Microtubules are distinct from actin filaments, which are involved in cell motility, and from thin filaments responsible for muscle contraction.

Identify the composition of microtubules: They are composed of tubulin, not actin, which is a key point in distinguishing them from other cytoskeletal components.

Conclude with the correct description: Microtubules are hollow tubes that provide structural support and are involved in intracellular transport, which aligns with the correct answer provided.