Major Groups of Microorganisms: Helminths Introduction

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Questions and Answers

Which major group of microorganisms includes eucaryotic, multicellular animals with bilateral symmetry and tissue differentiation?

  • Bacteria
  • Helminths (correct)
  • Fungi
  • Protozoa

What is a characteristic of parasitic helminths?

  • Highly developed digestive system
  • Simple reproductive system
  • Reduced or absent means of locomotion (correct)
  • Complex nervous system

Which type of helminth has a cylindrical body tapered at each end?

  • Trematodes
  • Roundworms (correct)
  • Flatworms
  • Nematodes

Which helminth lives in waters contaminated with feces and burrows through the skin of humans to enter the circulatory system?

<p>Blood Fluke (Schistosoma spp.) (D)</p> Signup and view all the answers

What is the main method by which Cestodes or Tapeworms absorb food?

<p>Absorption through the skin (A)</p> Signup and view all the answers

Which part of the tapeworm's body contains both male and female reproductive organs?

<p>Segments called proglottids (C)</p> Signup and view all the answers

What characteristic distinguishes Nematodes (Roundworms) from Cestodes (Tapeworms)?

<p>Covering of tough cuticle (B)</p> Signup and view all the answers

Which human parasite belongs to the Nematode group and is caused by infectious larvae?

<p>Adult Hookworm (Necator americanus) (C)</p> Signup and view all the answers

Which protozoan parasite causes diarrhea and is only manifested in women?

<p>Trichomonas vaginalis (C)</p> Signup and view all the answers

Which protozoan parasite infects the human liver before replicating in red blood cells and causing malaria?

<p>Plasmodium (A)</p> Signup and view all the answers

Which protozoan parasite replicates only in felines (cat family) and causes toxoplasmosis?

<p>Toxoplasma gondii (C)</p> Signup and view all the answers

Which protozoan parasite is the only ciliate that causes human disease by infecting the intestinal tract?

<p>Balantidium coli (A)</p> Signup and view all the answers

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