Protozoans Chapter 8

Protozoans 5 Groups Flagellated Amoeboid Foramanifiera Ciliates Coccidea 6th hr

Flagellated Have a pellicle (thin membrane) – gives body shape Free-living 7500 species identified 2 Groups: Phytoflagellated (autotrophic) or Zooflagellated (heterotrophic) Movement: Use Flagella 2-D whiplike/helical movements Push-pull Examples: Dinoflagellates (p) Euglena (p) Trypanosomes (h) – dwell in the tsetse fly gut 5th Hr Left off here!

Amoeboid Diet Reproduction Movement: Examples: Other protists, bacteria Eat by phagocytosis Particle feeders Reproduction Asexual - Binary fission once they become a certain size Some pathogenic Movement: Use pseudopodia – temp. cell extensions Examples: Rhizopodans (naked – no shell/test) Entamoeba – causes dysentery in humans (diarrhea…) P. 125 6th hr left off here!

Foraminifera Marine (Plankton) Secrete a calcium carbonate test Symmetrical pattern Make up much of marine sediments White cliffs of Dover, England = Foram Chalk deposit Movement: Reticulopodia – (branched conveyerbelt –like) Examples: Heliozoans Radiolarians

Ciliates Use cilia to generate feeding currents Dimorphic nuclei – Macronuclei (regulates daily metabolic activites) Micronucli (genetic reserve) Sexual reproduction Movement: cilia Examples: Paramecium Didinium 5th Hr. Left off here!

Coccidea All Parasites Cone structure to penetrate hosts Reproduction – asexual and sexual Cause diseases in domestic animals and humans Movement: No cilia or flagella Examples: Toxoplasma – Mostly asymptomatic, found in cat feces Pregnant Women - Stillbirths, spontaneous abortions, mental retardation Cryptosporidium Plasmodium – causes malaria Babesia

Plasmodium: Causes Malaria Chills Fever Rupture of red blood cells Release of toxic chemicals