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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Multiple Choice

Is cyclin-dependent kinase (CDK) active in G0 phase cells, and why?

Yes, because CDK activity is necessary for maintaining the G0 phase.

Yes, because G0 cells are actively dividing.

No, because CDK is only active during the S phase of the cell cycle.

No, because G0 cells are in a quiescent state and not actively cycling.

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Verified step by step guidance

Understand the cell cycle phases: The cell cycle consists of several phases, including G1, S, G2, and M phases. G0 is a phase where cells are in a quiescent state, meaning they are not actively dividing.

Define cyclin-dependent kinases (CDKs): CDKs are enzymes that, when activated by cyclins, regulate the progression of the cell cycle. They are crucial for transitions between different phases of the cell cycle.

Identify the role of CDKs in the cell cycle: CDKs are primarily active during phases where the cell is preparing to divide, such as the S phase, where DNA replication occurs, and the M phase, where mitosis takes place.

Examine the characteristics of G0 phase: Cells in the G0 phase are in a resting state and do not actively participate in the cell cycle. They are not preparing for division, which means CDK activity is not required.

Conclude the relationship between CDK activity and G0 phase: Since G0 cells are not actively cycling, CDKs are not active in this phase. CDK activity is associated with phases where cell division is occurring, not with the quiescent state of G0.