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 about microtubules during anaphase is true?

Microtubules remain unchanged in length during anaphase.

Microtubules shorten to pull sister chromatids apart.

Microtubules lengthen to push sister chromatids together.

Microtubules disassemble completely before anaphase begins.

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Understand the role of microtubules during cell division, specifically in the process of mitosis. Microtubules are part of the cytoskeleton and play a crucial role in separating sister chromatids during anaphase.

Recall that anaphase is a stage in mitosis where sister chromatids are pulled apart toward opposite poles of the cell. This movement is facilitated by the shortening of microtubules.

Microtubules are dynamic structures that can lengthen and shorten by adding or removing tubulin subunits. During anaphase, microtubules attached to the kinetochores of chromatids shorten, pulling the chromatids apart.

Consider the statement: 'Microtubules shorten to pull sister chromatids apart.' This accurately describes the mechanism by which chromatids are separated during anaphase.

Evaluate the other statements: 'Microtubules remain unchanged in length during anaphase,' 'Microtubules lengthen to push sister chromatids together,' and 'Microtubules disassemble completely before anaphase begins.' These are incorrect based on the known function of microtubules during anaphase.