Podcast
Questions and Answers
Which of the following is NOT a part of the protozoan cellular structure?
Which of the following is NOT a part of the protozoan cellular structure?
- Nucleus
- Cell wall (correct)
- Cytoplasm
- Cellular membrane
What is the function of the undulating membrane in protozoa?
What is the function of the undulating membrane in protozoa?
- Locomotion (correct)
- Digestion
- Protection
- Reproduction
Which stage of the protozoan life cycle is the reproductive stage?
Which stage of the protozoan life cycle is the reproductive stage?
- Oocyst
- Sporozoite
- Trophozoite (correct)
- Cyst
What is the primary function of the cyst stage in protozoa?
What is the primary function of the cyst stage in protozoa?
Which of the following protozoa is transmitted through insect vectors?
Which of the following protozoa is transmitted through insect vectors?
Which type of life cycle involves person-to-person transfer?
Which type of life cycle involves person-to-person transfer?
Which of the following is a method of nutrient uptake in protozoa?
Which of the following is a method of nutrient uptake in protozoa?
What is the primary method of asexual reproduction in protozoa?
What is the primary method of asexual reproduction in protozoa?
Which of the following is an example of an opportunistic pathogen?
Which of the following is an example of an opportunistic pathogen?
What is the primary pathological effect of Entamoeba histolytica in the intestine?
What is the primary pathological effect of Entamoeba histolytica in the intestine?
Which phylum does Plasmodium belong to?
Which phylum does Plasmodium belong to?
Which of the following protozoa is classified under Sarcomastigophora?
Which of the following protozoa is classified under Sarcomastigophora?
What is the infective stage of Entamoeba histolytica?
What is the infective stage of Entamoeba histolytica?
Which of the following is a diagnostic feature of Entamoeba histolytica trophozoites?
Which of the following is a diagnostic feature of Entamoeba histolytica trophozoites?
What is the most common clinical manifestation of intestinal amoebiasis caused by Entamoeba histolytica?
What is the most common clinical manifestation of intestinal amoebiasis caused by Entamoeba histolytica?
In which regions is Entamoeba histolytica most prevalent?
In which regions is Entamoeba histolytica most prevalent?
What is the drug of choice for treating amoebic liver abscess caused by Entamoeba histolytica?
What is the drug of choice for treating amoebic liver abscess caused by Entamoeba histolytica?
Which of the following is NOT a method of locomotion in protozoa?
Which of the following is NOT a method of locomotion in protozoa?
Which of the following is a characteristic feature of the cyst stage in protozoa?
Which of the following is a characteristic feature of the cyst stage in protozoa?
Which of the following protozoa causes malaria?
Which of the following protozoa causes malaria?
Flashcards
Undulating membrane
Undulating membrane
A protozoan structure that aids in movement.
Trophozoite Stage
Trophozoite Stage
The active, feeding, and reproductive stage of a protozoan.
Protozoan Cyst Stage
Protozoan Cyst Stage
A dormant, resistant form that helps protozoa survive in unfavorable conditions.
Insect Vector Transfer
Insect Vector Transfer
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Person-to-person Transfer
Person-to-person Transfer
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Phagocytosis in Protozoa
Phagocytosis in Protozoa
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Binary Fission
Binary Fission
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Opportunistic Pathogen
Opportunistic Pathogen
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Flask-shaped Ulcers
Flask-shaped Ulcers
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Apicomplexa
Apicomplexa
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Sarcomastigophora
Sarcomastigophora
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Cyst (E. hist)
Cyst (E. hist)
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RBCs in Endoplasm
RBCs in Endoplasm
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Dysentery
Dysentery
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Tropical Regions
Tropical Regions
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Metronidazole
Metronidazole
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Thickened Cyst Wall
Thickened Cyst Wall
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Plasmodium
Plasmodium
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Protozoan cell wall
Protozoan cell wall
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Plasmodium Transmission
Plasmodium Transmission
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Study Notes
Protozoan Cellular Structure
- Protozoa lack a cell wall.
- Protozoa possess a cellular membrane, cytoplasm, and a nucleus.
- The undulating membrane aids in locomotion.
Protozoan Life Cycle
- The trophozoite stage is the active, reproductive phase.
- The cyst stage is a dormant, resistant form aiding survival in harsh conditions.
Types of Protozoan Life Cycles
- Plasmodium, which causes malaria, is transmitted via mosquito vectors.
- Entamoeba histolytica is transmitted directly from person to person.
Physiology of Protozoa
- Protozoa uptake nutrients through phagocytosis, pinocytosis, and permeation.
- Binary fission is the most common form of asexual reproduction in protozoa.
Pathology of Protozoa
- Toxoplasma gondii is an opportunistic pathogen causing severe disease in immunocompromised individuals.
- Entamoeba histolytica causes flask-shaped ulcers in the intestinal lining.
Classification of Protozoa
- Plasmodium belongs to the phylum Apicomplexa.
- Giardia lamblia and Trichomonas vaginalis are classified under Sarcomastigophora.
Entamoeba histolytica Specifics
- The infective stage of Entamoeba histolytica is the mature cyst.
- Entamoeba histolytica trophozoites often contain red blood cells in their endoplasm, a key diagnostic feature.
- Dysentery, with bloody and mucous stools, is the most common symptom of intestinal amoebiasis caused by Entamoeba histolytica.
Epidemiology and Treatment of Protozoa
- Entamoeba histolytica is most prevalent in subtropical and tropical regions.
- Metronidazole is the drug of choice for treating amoebic liver abscess caused by Entamoeba histolytica.
General Protozoology
- Spores are a dormant stage and are not used for locomotion.
- The cyst stage has a thickened protective wall for survival in harsh conditions.
- Plasmodium is the causative agent of malaria.
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Description
Explore the cellular structure, life cycle, and physiology of protozoa. Learn about trophozoite and cyst stages, modes of transmission, and reproduction. Understand the pathology of protozoa, including diseases caused by Toxoplasma gondii and Entamoeba histolytica.
