Question

Schizogony of Plasmodium is limited inside the human body because,
(A) Large numbers of parasites are produced at the end of erythrocytic schizogony.
(B) Destruction of RBCs increases with every cycle of erythrocytic schizogony.
(C) Patient may develop resistance after a few cycles
(D) The survival of parasite is threatened by shortage of RBCs in the host

Answer 1

Hint: In ‘schizogony of plasmodium’ the word schizogony refers to the process of replication in which the plasmodium undergoes multiple rounds of nuclear divisions. But the cytoplasmic division is not done here. The life cycle of Plasmodium inside the human body begins with a series of asexual divisions in the liver and then in red blood cells.

Complete answer:
(A) The sporozoites, injected by the infected female Anopheles mosquito are carried to the liver through blood, they undergo asexual forms known as exoerythrocytic schizogony to form merozoites. They are limited inside the human body because a large number of parasites are produced at the end of erythrocytic schizogony.so this option is correct.
(B) The plasmodium is mainly reproduced in the liver, not in the RBC, and at the same time the plasmodium is a parasite which cannot live without a host .so this option is wrong
(C) The patient does not develop resistance after a few cycles because within a few cycles the plasmodium number increases rapidly and starts destroying the immune system.so this option is wrong.
(D) The survival of parasites does not concern the shortage of the RBC because the main part of the reproduction cycle is done in the liver cell.so this option is wrong.

The correct answer is (A) a Large number of the parasites are produced at the end of erythrocytic schizogony.

Note:
The plasmodium causes the malaria disease in which the female anopheles mosquitoes act as the vectors or transport system for plasmodium. The injected plasmodium migrates to the liver through the blood. And they start the reproduction and the newly formed progeny infects other body parts by travelling through the blood.