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

Introduction to the Cell Cycle

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to the Cell Cycle

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2:20 minutes

Problem 26a

Textbook Question

(a) What is cytokinesis?

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Cytokinesis is the process during cell division where the cytoplasm of a parent cell is divided into two daughter cells. It typically occurs after mitosis or meiosis.

Understand that cytokinesis ensures that each daughter cell receives the necessary organelles and cytoplasmic components to function independently.

In animal cells, cytokinesis involves the formation of a cleavage furrow, which is a contractile ring made of actin and myosin proteins that pinches the cell membrane inward until the cell splits into two.

In plant cells, cytokinesis occurs through the formation of a cell plate. Vesicles from the Golgi apparatus deliver materials to the center of the cell, forming a new cell wall that separates the two daughter cells.

Cytokinesis is crucial for growth, development, and tissue repair, as it allows cells to proliferate and maintain proper function in multicellular organisms.

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Key Concepts

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

Cytokinesis Definition

Cytokinesis is the process during cell division where the cytoplasm of a parental cell is divided into two daughter cells. It typically follows mitosis or meiosis, ensuring that each new cell receives an appropriate share of the cytoplasmic contents and organelles.

Mechanism of Cytokinesis

Cytokinesis involves the formation of a contractile ring composed of actin and myosin filaments, which constricts the cell membrane at the center of the cell. This process is crucial for physically separating the two daughter cells and is regulated by various proteins that ensure proper timing and coordination.

Differences in Cytokinesis

Cytokinesis differs between plant and animal cells. In animal cells, the cleavage furrow forms and pinches the cell in two, while in plant cells, a cell plate forms along the center, eventually developing into a new cell wall. Understanding these differences is essential for grasping how various organisms complete cell division.