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प्रश्न
Answer the following question.
Mention the special adaptations evolved in parasites and why?
उत्तर
The survival of a parasite in the body of the host depends upon its ability to adapt to the surrounding environment at the site of its infection. Certain morphological, anatomical, and physiological changes occur because of which the parasite survives in the host.
These are as follows:
- Body shape and size of the parasite depends upon the space available at the site of infection. e.g., Intracellular parasites are very small in size – Plasmodium.
- Locomotory structures almost absent in the parasitic forms, as they need not move in search of food.
- In the case of intestinal parasites, there is every possibility, that they are either harmed, injured, or digested by the gastrointestinal secretions of the host.
- To protect from the harmful effects of digestive enzymes, the parasite’s body surface is covered with cuticle (Nematodes – Ascaris lumbricoides).
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संबंधित प्रश्न
Name the causative organism of the disease amoebiasis. List three symptoms of the disease.
Mention the causative agent and the preventive measures for the following: Pneumonia.
Match the pathogens with respective diseases caused by them and select the correct match using the codes given below.
| Column I | Column II |
| I. Leishmania donavani | 1. Malaria |
| II. Wuchereria bancrofti | 2. Amoebiasis |
| III. Trypanosoma gambiense | 3. Kala - azar |
| IV. Entamoeba histolytica | 4. Sleeping sickness |
| 5. Filariasis |
Cerebral malaria is caused by ______.
A major reason for studying human aging is that:
Pons varolii in human brain lies:
Which of the following sets of diseases is caused by bacteria?
Widal test is carted out to test:
A person with sickle cell anemia is ______.
A patient complains of suffering from constipation, stomach ache, stool with blood clots and excess mucous. The physician diagnosed it as amoebiasis, after stool test.
- Write the scientific name of the microbe identified in the stool sample.
- How do you think, the patient must have contracted it?
- Write your suggestions to the patient to avoid infection in future.
