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Human Health and Disease — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Health and Disease3 Marks
Question
  1. Name the respective forms in which the malarial parasite gains entry into
  1. Human body
  2. Body of female Anopheles
  1. Name the hosts where the sexual and the asexual reproductions of malarial parasite occur respectively.
  2. Name the toxin responsible for the appearance of symptoms of malaria in humans. Why do these symptoms occur periodically?
✓

Answer

  1.  
  1. Sporozoite.
  2. Gametocycte.
  1. Sexual reproduction occurs in female Anopheles, while asexual reproduction occurs in man.
  2. Haemozoin (toxin)

Haemozoin is released when the RBCs rupture and release the pathogen.

Some cells of the pathogens enter fresh RBCs and reproduce asexually and repeat the cycle; hence the symptoms appear periodically.

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