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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.
संबंधित प्रश्न
Cancer is one of the most dreaded diseases. Explain 'Contact inhibition' and 'Metastasis' with respect to the disease
Explain what is meant by metastasis.
The antiviral proteins released by a virus-infected cell are called.
What is a carcinogen?
Name one chemical carcinogen with its target tissue.
antiviral proteins released by cells infected by the virus are called ______.
What is ‘Leukemia’?
Explain any four therapies used in treatment of cancer.
Which type of cancer affects lymph nodes and spleen?
Cancer of the epithelial cells is called ______.
In leukemia both WBCs and RBCs increase in number.
Blood cancer is called ______.
How do normal cells get transformed into cancerous neoplastic cells? Elaborate giving three examples of inducing agent.
Benign tumour is the one which
The immune system of a person is suppressed. In the ELISA test, he was found positive to a pathogen.
- Name the disease the patient is suffering from.
- What is the causative organism?
- Which cells of body are affected by the pathogen?
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?
What are the methods of cancer detection? Describe the common approaches for treatment of cancer.
Cancer is generally caused due to activation of ______ to ______ and/or inactivation of ______.
Which disease is caused by HPV?
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'.
