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प्रश्न
Cancer is one of the most dreaded diseases. Explain 'Contact inhibition' and 'Metastasis' with respect to the disease
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उत्तर
Normal cells have the property of contact inhibition (stoppage of growth on coming in contact with other cells) but cancer cells lose this property.
As a result, cancer cells divide continuously to give rise to a mass of cells (tumours).
Metastasis- This property is exhibited by malignant tumours. It is the pathological process of spreading cancerous cells to the different parts of the body. These cells divide uncontrollably, forming a mass of cells called tumour. From the tumour, some cells get sloughed off and enter the blood stream. From the blood stream, these cells reach distant parts of the body and therefore, initiate the formation of new tumours by dividing actively.
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संबंधित प्रश्न
Explain the various types of cancer
The antiviral proteins released by a virus-infected cell are called.
What is cancer?
Inactive gene that can cause cancer is called ______.
antiviral proteins released by cells infected by the virus are called ______.
What is ‘Leukemia’?
- How is a tumor formed in the body?
- What are the two types of tumor?
- Which of these under goes metastasis?
If a patient is advised Anti Retroviral Therapy, which infection is he suffering from? Name the causative organism.
In the given flow diagram, the replication of retrovirus in a host is shown. Observe and answer the following questions.
Fill in (1) and (2)
Why is the virus called retrovirus?
Can the infected cell survive while viruses are being replicated and released?
Immunotherapy these days is one of the most efficient ways of treatment of cancer. The therapy involved activates the immune system and destroys the tumour.
- Write an example of one such biological response modifier used in immunotherapy.
- Why do patients need such substances if immune system is already working in body?
- State what is 'Contact inhibition'.
