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

Cell Cycle Regulation

Anatomy & Physiology

3. Energy & Cell Processes

Cell Cycle Regulation

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Problem 5

Textbook Question

In the cells of some organisms, mitosis occurs without cytokinesis. This will result ina. cells with more than one nucleus.b. cells that are unusually small.c. cells lacking nuclei.d. cell cycles lacking an S phase.

Verified step by step guidance

Understand the process of mitosis: Mitosis is the division of a cell's nucleus into two genetically identical nuclei, each with its own set of DNA.

Understand the process of cytokinesis: Cytokinesis is the division of the cytoplasm, resulting in two separate cells.

Consider what happens if mitosis occurs without cytokinesis: The nucleus divides, but the cytoplasm does not, leading to a single cell with multiple nuclei.

Analyze the options: a) cells with more than one nucleus, b) cells that are unusually small, c) cells lacking nuclei, d) cell cycles lacking an S phase.

Determine which option aligns with the scenario of mitosis without cytokinesis: The correct answer is the one that describes a cell with multiple nuclei.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Mitosis

Mitosis is the process of cell division where a single cell divides to produce two identical daughter cells, each containing the same number of chromosomes as the original cell. It consists of several phases: prophase, metaphase, anaphase, and telophase. Understanding mitosis is crucial for recognizing how genetic material is distributed during cell division.

Cytokinesis

Cytokinesis is the final step of cell division, following mitosis, where the cytoplasm of a parental cell is divided into two daughter cells. In some organisms, if cytokinesis does not occur, it can lead to the formation of multinucleated cells, as the nuclei may divide without the cell physically separating. This concept is essential for understanding the implications of incomplete cell division.

Multinucleation

Multinucleation refers to the presence of multiple nuclei within a single cell, which can occur when mitosis happens without cytokinesis. This phenomenon is observed in certain organisms and can affect cellular function and growth. Recognizing multinucleation helps explain the outcomes of abnormal cell division processes.