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Human Health and Disease

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

Previous Year Papers

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Class 10 Class 12

A person suffering from a disease caused by Plasmodium experiences recurring chill and fever at the time when the

  • sporozoites released from RBCs are being rapidly killed and broken down inside spleen

  • trophozoites reach maximum growth and give out certain toxins

  • Parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs

  • microgametcytes and megagametocytes are being destroyed by the wBCs


C.

Parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs

In malaria, chill and fever are due to the release of a toxic substance haemozoin, formed by the breakdown of haemoglobin present in RBCs. It will be released after the rupture of RBCs in erythrocytic schizogony.

In malaria, chill and fever are due to the release of a toxic substance haemozoin, formed by the breakdown of haemoglobin present in RBCs. It will be released after the rupture of RBCs in erythrocytic schizogony.


List advantages of good health.

Healthy people are more efficient and productive. good health also brings prosperity and people live long. It also reduces infant and maternal mortality.

Name three important aspects to maintain good health.

(i) Balanced diet (ii) Personal hygiene and (iii) Regular exercise.

What is disease ?

Malfunctioning of one or more organs characterised by signs and symptoms is called disease.

What is the significance of ‘Typhoid Mary’ ?

Typhoid Mary was a Typhoid carrier who continued to spread typhoid for several years through food she prepared.

What is health ?

It is a state of complete, physical, mental and social well being of a person.