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Description
Flashcards by Tatiana Golwalla, updated 3 months ago
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Created by Tatiana Golwalla
3 months ago
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| Question | Answer |
| Protists | • all are single-celled, eukaryotic organisms - nucleated • paraphyletic grouping (don't share common answer) of organisms • may or may not have a sexual process • some use flagella or cilia for locomotion, others use gliding motility |
| Protists 3 Majors Groups: | - animal-like protozoa - plant-like algae - fungus-like slime molds and water molds |
| Parasitic Protists | • parasitic protists infect virtually all sites in the body either intracellularly or extracellularly • both simple and highly complex life cycle strategies • some possess resistant stages to pass from host to host • others use intermediate and/or paratenic hosts to move from one definitive host to the next • zoites move using flagella, cilia, amoeboid motion or gliding motility |
| What are Apicomplexa?? | • all members of the Phylum Apicomplexa • single-celled organisms • usually complex life cycles • possess a more or less developed “apical complex” • possess flattened subpellicular vesicles - alveolates (share this feature with the dinoflagellates and ciliates) |
| Gregarines (Eugregarines and Neogregarines) | • “body” segmentation • extracellular syzygy • gametocysts formed (usually gut of invertebrates) • may or may not have merogonic development |
| Eimeriid Coccidia (Eimeria spp. and their relatives | • intestinal development in specific vertebrates • oocysts with Stieda bodies • sporozoites with refractile bodies |
| “Isosporoid” Coccidia (Sarcocystis, Toxoplasma, Neospora, etc. belonging to the Sarcocystidae) | • parasites of vertebrates • heteroxenous or facultatively heteroxenous • oocysts without Stieda bodies • sporozoites without refractile bodies |
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