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Micro

Protists

QuestionAnswer
Kingdom Protista? Sub Kingdom algae Sub Kingdom protozoa
Protist? Any UNICELLULAR or colonial organism that LACKS TRUE TISSUES
The protozoa include about? 65,000 species Most members are harmless inhabitants of the water ad soil A few species are parasites responsible for millions Of infections in humans per year
Photosynthetic protists? Group of photosynthetic organisms Seaweed and kelp are the most recognizable Algae exhibits all of the eukaryotic organelles chloroplasts contains green chlorophyll Other pigments create yellow red and browned coloration
(the algae) Plankton? floating community of microscopic organisms (animals & some plants) A central role in aquatic food web Produce most of the Earth's oxygen widespread inhabitant of fresh and marine water
Protozoan form and function? Single cells containing all major eukaryotic organelles except chloroplasts Organelles can be highly specialized into structures such as Mouths digestive systems reproductive traits legs- means of locomotion
(habitat & range) Heterotrophic? Require their food and complex organic form Free living species Scavenge dead plants or animal debris Grays on living cells of bacteria and algae
(habitat & range) Parasitic species? Live on fluids of the host such as plasma and digestive juices May actively feed on tissues
(Styles of locomotion) Pseudopods? "false feet" Serve as feeding structures
(Styles of locomotion) flagella? vary in numbers from one to several
(Styles of locomotion) Cilia? Distributed over the entire surface of the cell in characteristic patterns
Characteristics of protozoa based on the mode of locomotion? (4) Amoeboids (Pseudopodia) Ciliates (cilia) Sporozoa (Non-motile) Flagellates (flagella)
(Protozoan life cycle) Trophozoite? Motile and feeding stage (active stage) Requires ample food and moisture to remain active
(Protozoan life cycle) Cyst? Dormant resting stage Formed when conditions become unfavorable important factor in spread of disease
Protozoan reproduction simple asexual methods? Mitosis Fission Multiple fission Budding SEXUAL REPRODUCTION ALSO OCCURS
(flagella alone or flagella & amoeboid motion) Flagellates? single nucleus sexual reproduction form cyst in our free living very common one is Giardia lamblia
(those using amoeboid motion to move) Amoeboids? Primary amoeba Use pseudopods for locomotion Asexual reproduction by Fission Mostly uninucleate Usually encyst free-living Most not infectious
Ciliates? Some have cilia in tufts for feeding and attachment Most developed cysts Have macronuclei and micronuclei Division by transverse fission Most have definite mouth and feeding organelle Free living and harmless
Sporozoa? Those with no motility motility options in most representatives Complex life cycles with well developed asexual and sexual stages Entire group is parasitic
(Protozoan identification) Considerations in identification? Shape and size of cell type number and distribution of locomotor structures Presence of special organelles or cysts Number of nuclei
Parasitology? Study of protozoa and helminths
Parasite? Term most often used to denote Protozoan and Helminth pathogens
(Important Protozoan pathogens) Pathogenic flagellates? Trypanosomes
(Important Protozoan pathogens) Trypanosoma brucei? African sleeping sickness
(Important Protozoan pathogens) Trypanosoma Cruzi? Chagas disease
(infective amoebas: entamoeba) Amoebic Dysentery? Entamoeba Histolytica 4th most common protozoan infection in the world Disease is transmitted through ingestion of food or water contaminated with human feces
(Common infections) Gairdia lambila? For those who don't get sick signs and symptoms usually appear one to three weeks after exposure Watery sometimes foul smelling diarrhea Fatigue and malaise Abdominal cramps and bloating Gas or flatulence Nausea Weight loss
(Common infections) Malarial Diseases? Plasmodium is a genus of unicellular eukaryotes that are obligate parasites of vertebrates and insects
Symptoms of Malaria? Skin- chills and sweating Respiratory- Dry cough Spleen- Enlargement Stomach- nausea vomiting Back- Pain Muscular- Fatigue pain Systemic- fever Central- headache
Created by: hw0993422
 

 



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