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प्रश्न
What is cancer?
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उत्तर
Cancer is the uncontrolled growth of abnormal cells in the body. Cancer develops when the body’s normal control mechanism stops working. Old cells do not die and instead grow out of control, forming new, abnormal cells. These extra cells may form a mass of tissue, called a tumor. Some cancers, such as leukemia, do not form tumors.
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संबंधित प्रश्न
Explain the various types of cancer
Name any two techniques that are useful in detecting cancers of internal organs.
Why are cancer patients often given α-interferon as part of the treatment?
Explain what is meant by metastasis.
Give the symptoms of cancer.
Carcinoma is cancer of ______ cells.
antiviral proteins released by cells infected by the virus are called ______.
What is ‘Leukemia’?
Explain any four therapies used in treatment of cancer.
Cancer cells are more easily damaged by radiations than normal cells because they are ______.
Which type of cancer affects lymph nodes and spleen?
Metastasis is associated with ______.
The cancer that generally affects lymph nodes and spleen is ______.
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?
Genes involved in cancer are ______.
Cancer is generally caused due to activation of ______ to ______ and/or inactivation of ______.
The interferons are ______.
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'.
