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Assertion . Sporozoites of malaria paras...

Assertion . Sporozoites of malaria parasite enter human body by biting of new born female Anopheles whose mother was carrier .
Reason. Male and female gametocytes of malaria parasite develop in human intestine.

A

If both Assertion & Reason as true & the Reason is a correct explanation of the assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False.

D

If both Assertion & Reason are false.

Text Solution

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The correct Answer is:
D
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Explore conceptually related problems

Trace the life-cycle of malarial parasite in the human body when bitten by an infected female Anopheles.

Name the respective forms in which the malaria parasite gains entry into (i) Human body, (ii) Body of female Anopheles.

Assertion: There is no chance of transmission of malaria to a man on the bite of a male Anopheles mosquito. Reason: It carries a non virulent strain of Plasmodium.

Trace the route of Sporozoite of Plasmodium when it enters the human body through the bite of infected female Anopheles mosquito till its entry into the R.B.C.

Assertion : Sperm formation continues even in old men but formation of ovum caeses in women around the age of fifty years . Reason : Human male having the longer life span than the female .

Read the statements given below. Identify which of them are true and which of them are false. Select the correct option after referring to the table. I. Malaria is caused by a protozoan know as plasmodium. II. Plasmodium vivax malaria is the most serious one and can be fatal . III. Plasmodium enters the female body by the bite of the female Anopheles mosquito. IV. The parasites initially attack the liver cells and then multiple in the WBCs causing their rupture.

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 RBCs, resulting in bursting of RBCs and causing the cycles of fever, relased parasites infect new RBCs. 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 RBCs. 6. Female Anopheleles 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.

Assertion : Females not participate in the determination of the sex of baby . Reason : Human male is heterogametic .

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.

(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.

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