Protists

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  • What is meant by the word transport? Moving substances across the cell membrane
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • What is the cell membrane made of? Lipids make it polar--> oxygen and co2 can readily pass through Small molecules can pass through protein pores
  • Protists

    1. 1. Protists
    2. 3. Defining a Protist <ul><li>Protists are eukaryotic organisms that cannot be classified as animals, plants, or fungi </li></ul><ul><li>Usually microscopic, usually unicellular </li></ul>
    3. 4. Defining a Protist <ul><li>Can be autotrophic or heterotrophic </li></ul><ul><li>Move by cilia, flagella, or psuedopodia </li></ul>
    4. 5. Reproduction <ul><li>Fission (binary, multi) </li></ul><ul><li>Conjugation </li></ul>
    5. 6. Animal-Like Protists <ul><li>Most are heterotrophic, moving around to capture prey </li></ul>Plasmodium (malaria) Apical Complex Parasitic Apicomplexa Trypanosomes (sleeping sickness) Flagella Parasitic Sarcomasti-gophora Paramecium Cilia Ciliophora Amoeba Psuedopodia Protozoa Examples Characteristics Phylum
    6. 7. Animal-Like Protists
    7. 8. Plant-Like Protists <ul><li>Most are autotrophic algae </li></ul>phytoplankton Diatoms Shells Bacillariophyta Coralina (marine seaweed) Red Algae Phycobilins Rhodophyta Macrocystis pyrifera (Kelp) Brown Algae fucoxanthin Phaeophyta Protococcus (terrestrial) Green Algae Chlorophyll a & b Chlorophyta Examples Characteristics Phylum
    8. 9. Plant-Like Protists Euglenoids Plant-like and Animal-like Euglenophyta Cyst forming (frozen seas) Golden Algae (carotenoids) Chrysophyta dinoflagellates Bioluminescence (red tide) Dinoflagellata Examples Characteristics Phylum
    9. 10. Plant-Like Protists
    10. 11. Fungus-Like Protists <ul><li>Slime molds and Water molds </li></ul>Water Molds (Chytrids) Aquatic protists Chytridiomycota Water Molds Parasitic Oomycota Cellular Slime Molds Pseudoplasmodium (mass of cells) Dictyostelida Plasmodial Slime Molds Plasmodium (mass of cytoplasm) Myxomycota Examples Characteristics Phylum
    11. 12. Fungus-Like Protists
    12. 13. Protists and the Environment <ul><li>Produce large amounts of OXYGEN </li></ul><ul><li>Critical to marine FOOD WEBS </li></ul><ul><li>Carbon Cycle </li></ul><ul><li>Decomposition </li></ul><ul><li>Symbiosis (corals, lichens, digestion) </li></ul>
    13. 14. Algal Blooms <ul><li>High temps and increase in nutrients (nitrates and phosphates) lead to increased algae populations </li></ul><ul><li>Harmful to fish and humans (red tide) </li></ul>
    14. 15. Protists and the Industry <ul><li>Food Source (kelps and sea weeds) </li></ul><ul><li>By products used in cosmetics, drugs, and gelatins </li></ul><ul><li>Agar - polysaccharide from cell walls of red algae </li></ul><ul><li>Diatom shells used as abrasive </li></ul>
    15. 16. Protists and the Human Health <ul><li>Malaria > caused by Plasmodium (apicomplexan) </li></ul><ul><li>Sleeping Sickness > caused by protozoa > spread by tsetse fly </li></ul><ul><li>Trichomoniasis > caused by Trichomonas vaginalis (mastigophoran) > one of the most common sexually transmitted diseases </li></ul><ul><ul><li>Discolored discharge, genital itching, the urge to urinate </li></ul></ul>

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