M5 Eukaryotic Microbes

Cards (65)

  • Algae
    Photosynthetic, eukaryotic organisms
  • Algae produce energy by photosynthesis
  • All algal cells consist of cytoplasm, a cell wall, a cell membrane, a nucleus, plastids, ribosomes, mitochondria, and Golgi bodies
  • Most algal cell walls contain cellulose
  • Algae are classified as green, golden, brown, or red algae
  • Prototheca is a very rare cause of human infections
  • Phycotoxins
    Algae in several other genera secrete toxic substances. These are poisonous to humans, fish, and other animals.
  • If ingested by humans, the phycotoxins produced by the dinoflagellates that cause red tides can lead to a disease called paralytic shellfish poisoning
  • Protozoa
    Are nonphotosynthetic, eukaryotic organisms. They are unicellular, free-living and found in soil and water
  • Pellicle
    Serves as protection
  • Two stages of typical protozoan life cycle:
    Trophozoite and Cyst
  • Trophozoite
    The motile, feeding, and diving stage
  • Cyst
    The nonmotile, dormant and survival stage
  • Parasitic protozoa cause human diseases such as malaria, giardiasis, and trypanosomiasis
  • Amebae
    Move by means of pseudopodia (false feet)
  • Ciliates
    Move by means if harilike cilia
  • Flagellates
    Move by means of whiplike flagella
  • Sporozoa have no visible means of locomotion
  • Entamoeba histolytica
    Cause of amebic dysentery
  • Balantidium coli
    The cause of balantidiasis
  • Giardia intestinalis
    The cause of giardiasis
  • Plasmodium spp.
    The cause of malaria
  • Mycology
    The study of fungi
  • Mycologists
    Scientists who study fungi
  • Fungi
    Are the garbage disposers of nature
  • Chitin
    Fungal cell walls contain a polysaccharide called?
  • Hyphae
    Some fungi are unicellular, while other grow as filaments called?
  • Mycelium
    Hyphae intertwine to form a mass called?
  • Septate hyphae
    The hyphae are divided into cells by cross wall ors septa
  • Aseptate hyphae
    The hyphae do not contain septa
  • Two general categories of spores:
    Sexual spores
    Asexual spores (also called conidia)
  • Classification of fungi:
    Mode of sexual reproduction and type of sexual pore they produce
  • Six phyla of fungi:
    Zygomycotina
    Chytridiomycotina
    • Ascomycotina
    Basidiomycotina
    Mycosporidia
    Deuteromycotina
  • Yeasts
    Are eukaryotic, unicellular organisms that lack mycelia
  • Blastospores or blastoconidia
    Individual yeast cells can be observed only using a microscope
  • Yeasts usually reproduce by budding
  • Pseudohypha
    A string of elongated buds
  • Chlamydospores
    Some yeasts produce thick-walled, spore-like structures called?
  • Yeasts have been used for centuries to make wine and beer
  • Candida albicans
    Is the yeasts most frequently isolated from human clinical specimens, and is also the fungus most frequently isolated from human clinical specimens