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Questions and Answers
Which of the following are considered chemical factors affecting cell proliferation?
Which of the following are considered chemical factors affecting cell proliferation?
- Radiation
- RAD
- Temperature
- VEGF (correct)
Benign tumors are always harmful and lead to cancer.
Benign tumors are always harmful and lead to cancer.
False (B)
What happens to a cell if its surface area to volume ratio becomes too low?
What happens to a cell if its surface area to volume ratio becomes too low?
It will divide to maintain proper nutrient exchange.
_______ is the process of forming new blood vessels.
_______ is the process of forming new blood vessels.
Match the following terms with their descriptions:
Match the following terms with their descriptions:
Flashcards
Surface Area to Volume Ratio
Surface Area to Volume Ratio
The ratio between a cell's surface area and its volume. It affects nutrient exchange and cell growth.
Growth Factors
Growth Factors
Chemical signals that stimulate cell division and growth. Examples include VEGF (vascular endothelial growth factor).
Anti-mitotic Drugs
Anti-mitotic Drugs
Chemicals that inhibit cell division. They are used in cancer treatments to stop tumor growth.
Angiogenesis
Angiogenesis
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What are the two main types of tumors?
What are the two main types of tumors?
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Study Notes
Cell Division Regulation
- Cell division is controlled by various factors, including other organisms, surface area-to-volume ratio, physical factors, and chemical factors.
Surface Area to Volume Ratio
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Optimal substance exchange requires a large surface area-to-volume ratio.
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If the ratio is too small, cells divide to increase the ratio, ensuring efficient nutrient intake and waste removal.
Physical Factors
- Temperature, radiation, and other physical factors affect cell division.
Chemical Factors
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Growth factors, such as VEGF (vascular endothelial growth factor), stimulate cell division, while anti-mitotic molecules inhibit it.
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Hormones (e.g., human growth hormones, sex hormones) also play a role.
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Certain drugs, like thalidomide and paclitaxel, influence cell division, often in medicinal contexts.
Uncontrolled Cell Division
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Uncontrolled cell division (e.g., in tumors) can lead to various health issues.
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Mutations and exposure to harmful factors can contribute to uncontrolled cellular division.
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