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

During the formation of the spindle apparatus in mitosis, which of the following structures must break down?

Mitochondrial membrane

Nuclear envelope

Cell membrane

Golgi apparatus

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Verified step by step guidance

Understand the context of mitosis: Mitosis is a process of cell division that results in two genetically identical daughter cells from a single parent cell. It involves several stages, including prophase, metaphase, anaphase, and telophase.

Identify the role of the nuclear envelope: The nuclear envelope is a double membrane structure that encloses the nucleus, separating it from the cytoplasm. It plays a crucial role in protecting the genetic material during interphase.

Recognize the changes during prophase: During prophase, the first stage of mitosis, the chromatin condenses into visible chromosomes, and the spindle apparatus begins to form. For the spindle fibers to access the chromosomes, the nuclear envelope must disassemble.

Consider the function of the spindle apparatus: The spindle apparatus is responsible for separating the sister chromatids and ensuring they are evenly distributed to the daughter cells. It requires access to the chromosomes, which is facilitated by the breakdown of the nuclear envelope.

Conclude which structure breaks down: Given the need for the spindle apparatus to interact with the chromosomes, the nuclear envelope must break down during prophase to allow this interaction, making it the correct answer.