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(a) Name the infective stage of Plasmodi...

(a) Name the infective stage of Plasmodium which Anopheles mosquite take in along with the blood meal from an infected humen.
(b) Why does the infection cause fever in humen ?
Give a flow chart of the part of the life-cycle of this parasite passed in the insect.

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(a) Gametocyte.
(b) The rupture of RBC is associated with released of a toxic substance, haemozoin, which is responsible for the chill and high fever recurring every three to four days.
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Study carefully the following stages of life cycle of malarial parasite i.e., Plasmodium. Arrange these stages in the correct sequence and select the correct answer. 1. Sporozoites leave the blood stream and enter the liver cells of man. 2. Sporozoites present in the salivary glands of female Anopheles mosquito are injected into the blood stream of man. 3. The parasite reproduces asexually in RRCs, resulting in bursting of RRCs and causing the cycles of fever, released parasites infect new RRCs. 4. The parasite reproduces asexually in liver cells, ultimately causing the rupturing of cells. 5. Two types of gametocytes i.e., microgametocytes and macrogametocytes develop in the RRCs. 6. Female Anopheles mosquito takes up the gametocytes with blood meal of an infected person. 7. Mature infective stage of the parasite i.e., sporozoites escape from intestine and migrate to the mosquito's salivary glands. 8. Fertilisation and developmental stages of the parasite take place in mosquito's stomach.

(i) How and at what stage does Plasmodium enter into a human body ? (ii) With the help of a flow-chart only show the stages of asexual reproduction in the life-cycle of the parasite in the infected human. (iii) Why does the victim show symptoms of high fever ?

(i) Which organ of the human body is initially affected when bitten by an infected female Anopheles ? Name the stage of the parasite that infects this organ. (ii)Explain the events that are responsible for chill and high fever in the patient.

(a) State what happens in the human body when malarial parasites infected RBCs burst to release the parasites in the blood. (b) Mention the specific sites in the host body where production of (i) sporozoites and (ii) gametocytes take place in the life cycle of the malarial parasites.

Refer to the given statements regarding malarial parasite and select the incorrect ones. I. Infective stage of Plasmodium in man is sporozite which reached the liver through blood. II. In the liver of man parasite reproduces sexually producing a large number of metacryptomerozoids in blood. III. When female Anopheles sucks blood the gametocytes are taken in and they become lodged in the salivary glands as ookinete. IV. The sexual stage, gametocytes of Plasmodium developes in RBCs of man.

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