Biological Classification And System Of Classification Question 174
Question: Assertion : Malarial fever appear at merozoite stage of Plasmodium. Reason : The infective stage of Plasmodium is sporozoite.
Options:
A) If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B) If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C) If the assertion is true but the reason is false
D) If both the assertion and reason are false
Show Answer
Answer:
Correct Answer: B
Solution:
When the mosquito bites man, sporozoites present in the salivary gland of female Anopheles mosquito are injected into the blood of the man.
The erythrocytic schizont gives rise to merozoites.
Malaria fever occurs when shcizonts in red blood corpuscles burst and set free their contained merozoites and malarial pigment (haemozoin) in the blood plasma.
Bursting of schizonts tends to be synchronous as hey all burst at the same time.
Haemozoin is said to be toxic and so includes high fever and shivering (Haemozoin is a unused hematin, which is produced by the breakdown of haemoglobin).
It is yellow brown to blackish in colour.
BETA
