Biology Past Paper PDF 17/10/2024
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Uploaded by DexterousJadeite6347
2024
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Summary
This document presents notes on various parasitic organisms, including Entamoeba Histolytica, Giardia Lambalia, and Trypanosoma Brucei. It details their morphology, life cycles, and associated diseases like sleeping sickness and diarrhea. These are important concepts in parasitology.
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# Biology - 17/10/2024 ## Entamoeba Histolytica - **In the intestine:** Sarcoding - **Trophozoite:** Feeding & Active stage - **Morphology:** Nucleus: single & spherical - **Karyosome:** Central & **Chromatin:** Peripheral - **Cytoplasm:** - **Ectoplasm:** Outer, transpa...
# Biology - 17/10/2024 ## Entamoeba Histolytica - **In the intestine:** Sarcoding - **Trophozoite:** Feeding & Active stage - **Morphology:** Nucleus: single & spherical - **Karyosome:** Central & **Chromatin:** Peripheral - **Cytoplasm:** - **Ectoplasm:** Outer, transparent - **Endoplasm:** Inner, granular - **Pseudopodia:** Motility - **Food Vacuoles:** RBCs (Erythrocytes), WBCs (Leukocytes), ingested tissue, RBCs ## Entamoeba Histolytica - Cyst - **Infective Stage:** Amebic dysentery (watery diarrhea) - **Morphology:** 4 nuclei (quatri nucleated cyst) - **Cytoplasm:** Chromatid bar, Glycogen - **Refractile membrane:** Rounded structure ## Giardia Lambalia - **Trophozoite:** Diarrheal illness - **Morphology:** Pear shape, flagellum (4 pairs) - **Binucleated** - 2 Anterior, 2 Posterior, 2 Ventral, 2 Caudal - 2 nuclei - **Adhesive disc:** Anterior bodies, function unknown - **Median bodies:** Unknown ## Trypanosoma Brucei - **Sleeping sickness** - **Morphology:** Elongated/Tapered shape - **Cell membrane (Pellicle):** MCIGAIER/Ribosomes - **Kinetoplast:** Thousands of mitochondria - **1 attached flagella** - **Basal body:** undulating membrane - **Free flagella** ## Plasmodium Malaríae - **Ring shape** - Cytoplasm - Chromatin - Band - **3 forms** - Amoid - Gametocytes (sexual)
