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

3. Energy & Cell Processes

Phases of Mitosis

Anatomy & Physiology

3. Energy & Cell Processes

Phases of Mitosis

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Multiple Choice

Why does the nuclear envelope break down during prometaphase?

To allow the chromosomes to condense.

To allow the sister chromatids to form

To allow the mitotic spindle to form.

To allow spindle fibers to attach to chromosomes.

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Verified step by step guidance

Understand the role of the nuclear envelope: The nuclear envelope is a double membrane structure that surrounds the nucleus in eukaryotic cells, protecting the genetic material inside.

Recognize the stages of mitosis: Mitosis is divided into several stages, including prophase, prometaphase, metaphase, anaphase, and telophase. Each stage has specific events that prepare the cell for division.

Identify the events of prometaphase: During prometaphase, the nuclear envelope breaks down, which is a crucial step in the process of mitosis.

Explain the purpose of the nuclear envelope breakdown: The breakdown of the nuclear envelope allows the mitotic spindle, a structure made of microtubules, to access the chromosomes.

Connect the breakdown to spindle fiber attachment: With the nuclear envelope disassembled, spindle fibers can attach to the kinetochores on the chromosomes, facilitating their alignment and separation during subsequent stages of mitosis.