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"Pranay suffered from measles at the age...

"Pranay suffered from measles at the age of 10 years. There are rare chances of his getting infected with the same disease for the rest of his life." Give reasons for the statement.

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First exposure to the infection acts as vaccination. Some of the immune cells transformed into memory cells which get familiar with the nature of micro-organisms and rapidly produce antibodies when reinfected
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A ten year old boy had chicken pox. He is not expected to have the same disease for the rest of his life. Why?

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The average age of board of directors of a company having 10 directors was 48 years. Coincidentally when a director aged 53 registered from the board of directors another director died on the same day . So new director joined the board of directors aged 34. next year in the same month the average age of all the 9 directors was found to be 46 years. The age of the late director at the time of his death was:

MODERN PUBLICATION-HUMAN HEALTH AND DISEASES-REVISION EXERCISES (II. VERY SHORT ANSWER QUESTIONS) (B. QUESTIONS FROM CBSE EXAMINATIONS)
  1. A 10 year old boy had chicken pox. He is not expected to have the same...

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  2. Name type of virus causes AIDS ? Name its genetic material.

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  3. How does smoking tabacco in human lead to oxygen deficiency in their b...

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  4. State two different roles of spleen in the human body.

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  5. How do interferéns protect us?

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  6. "Pranay suffered from measles at the age of 10 years. There are rare c...

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  7. Why sharing of injection needles between two individuals is not recomm...

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  8. When does a human body elicit an anamnestic response?

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  9. Name any two types of cells which act as 'cellular barriers' to provid...

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  10. Name the two intermediate hosts which the human liver fluke depends on...

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  11. Give an example of a plant which came into India as a contaminant and ...

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  12. Why is secondary immune response more intense than the primary immune ...

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  13. Indiscriminate diagnostic practices using X-rays etc. should be avoide...

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  14. Retroviruses have no DNA. However, the DNA of the infected host cell d...

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  15. give an example of human disorder that is due to a single gene ...

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  16. Suggest a method to ensure an anamnestic response in humans.

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  17. Name two diseases whose spread can be controlled by the eradication of...

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  18. How do cytokine barriers provide innate immunity in humans?

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  19. Name any two physiological barriers that provide innate immunity.

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  20. Write the scientific name of the organism Alexander Flemming worked on...

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