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Questions and Answers
What is a distinguishing feature of the trophozoite stage of Entamoeba histolytica?
What is a distinguishing feature of the trophozoite stage of Entamoeba histolytica?
- It exhibits a pear shape.
- It has multiple flagella.
- It has a double nucleus.
- It possesses pseudopodia for motility. (correct)
Which of the following best describes the cyst morphology of Entamoeba histolytica?
Which of the following best describes the cyst morphology of Entamoeba histolytica?
- Presence of flagella structures.
- Four nuclei along with a chromatid bar. (correct)
- Single nucleus with no distinct structures.
- No cytoplasm present.
What type of illness is associated with Giardia lamblia?
What type of illness is associated with Giardia lamblia?
- Malaria.
- Sleeping sickness.
- Amebic dysentery.
- Diarrheal illness. (correct)
Which morphological characteristic is associated with Trypanosoma brucei?
Which morphological characteristic is associated with Trypanosoma brucei?
What is a unique feature of the ring form of Plasmodium malariae?
What is a unique feature of the ring form of Plasmodium malariae?
Study Notes
Entamoeba Histolytica
- Sarcodina: Amoeba-like movement in the intestines
- Trophozoite: Active feeding stage
- Nucleus: Single, spherical shape
- Karyosome: Central, concentrated area of DNA
- Chromatin: Peripherally located DNA material
- Cytoplasm: Has a distinct structure
- Ectoplasm: Clear outer layer
- Endoplasm: Granular inner layer
- Pseudopodia: Extensions for movement
- Food Vacuoles: Ingest red blood cells (RBCs), white blood cells (WBCs), and tissues
- Nucleus: Single, spherical shape
Entamoeba Histolytica Cyst
- Infective Stage: Responsible for amebic dysentery (severe diarrhoea)
- Morphology: 4 nuclei (quatri nucleated cyst)
- Cytoplasm: Contains a chromatid bar (a dark structure) and glycogen (stored energy)
- Refractile membrane: Rounded structure acting as a protective layer
Giardia Lambalia
- Trophozoite: Responsible for diarrhoea
- Morphology: Pear-shaped with 4 pairs of flagella (hair-like structures for movement)
- Binucleated: Has two nuclei
- Flagella: 2 anterior, 2 posterior, 2 ventral, and 2 caudal
- Adhesive disc: Anterior structures, unknown function
- Median bodies: Unknown function
Trypanosoma Brucei
- Sleeping Sickness: A fatal disease affecting the nervous system
- Morphology: Elongated and tapered shape
- Cell membrane (Pellicle): Protective outer layer
- Kinetoplast: Compact mitochondrial DNA structure
- Flagella: One attached flagella
- Basal body: Anchoring point for the flagella, forms an undulating membrane
- Free flagella: Protrudes from the cell
Plasmodium MalarÃae
- Ring shape: Typical stage in red blood cells, visible under microscope
- Cytoplasm: Outer layer of the parasite cell
- Chromatin: Dense area of DNA
- Band: A darker ring around the cell
- 3 forms
- Amoid: Amoeba-like stage
- Gametocytes: Sexual stage of the parasite
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Description
This quiz covers the key features of Entamoeba Histolytica and Giardia Lambalia, focusing on their morphology and life stages. Explore the characteristics of trophozoites, cysts, and the implications for human health. Ideal for students studying microbiology or parasitology.
