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

Cancer

Anatomy & Physiology

3. Energy & Cell Processes

Cancer

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Multiple Choice

Which of the following hypotheses is best supported by observing cancer cells in a culture?

The cancer cells produce molecules that inhibit the growth factors required for cell division.

The cancer cells exhibit anchorage dependence.

The cancer cells spend the majority of their time in the G₀ phase.

All of the listed responses are correct.

The cancer cells do not exhibit density-dependent inhibition.

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Verified step by step guidance

Understand the characteristics of cancer cells: Cancer cells often exhibit uncontrolled growth and division, which is a key feature that differentiates them from normal cells.

Review the concept of density-dependent inhibition: In normal cells, density-dependent inhibition is a regulatory mechanism where cell division stops when cells become crowded. Cancer cells typically lack this inhibition, allowing them to continue dividing even when densely packed.

Analyze the given hypotheses: Evaluate each hypothesis based on the known behavior of cancer cells. For example, cancer cells usually do not require external growth factors to divide, and they often do not exhibit anchorage dependence, meaning they can grow without being attached to a surface.

Consider the G0 phase: The G0 phase is a resting state where cells are not actively dividing. Cancer cells are characterized by their rapid division and are less likely to spend significant time in the G0 phase.

Conclude with the best-supported hypothesis: Based on the characteristics of cancer cells, the hypothesis that they do not exhibit density-dependent inhibition is best supported, as this aligns with their ability to grow uncontrollably in culture.