Metazoa-Helminths: Characteristics and Life Cycle
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Questions and Answers

What is the primary mode of acquiring helminth infections?

  • By ingesting the larval stage or eggs in feces (correct)
  • Through inhalation of contaminated air
  • Through direct contact with an infected host
  • Through the bite of an infected insect

What is the characteristic shape of Trematodes?

  • Flat
  • Ribbon-like
  • Round
  • Leaf-like (correct)

Which type of helminth has a truly parasitic lifestyle, existing primarily inside the host?

  • Platyhelminths
  • Nematodes
  • Trematodes
  • Cestodes (correct)

What is the function of the cuticle in helminths?

<p>Protection and support (C)</p> Signup and view all the answers

How do helminths acquire nutrients?

<p>Through both active ingestion and passive absorption (B)</p> Signup and view all the answers

What is the characteristic of the nervous system in helminths?

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

Which of the following protozoa is the only human parasite that moves by cilia?

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

What is the primary mode of transmission for Trichomonas vaginalis?

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

Which of the following flagellates is an intestinal parasite causing a diarrheal illness?

<p>Giardia lamblia (B)</p> Signup and view all the answers

What is the name of the disease caused by Leishmania?

<p>Leishmaniasis (B)</p> Signup and view all the answers

In which stage is Leishmania infective and found in the sandfly vector?

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

How long can Trichomonas vaginalis trophozoites survive in urine, semen, and water?

<p>24 hours (D)</p> Signup and view all the answers

What is the characteristic symptom of Enterobiasis or pinworm infection?

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

What is the diagnosis method used for Enterobiasis?

<p>Scotch Tape Method (C)</p> Signup and view all the answers

Which of the following is NOT a symptom of Ankylostomiasis?

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

What is the characteristic feature of Shistosoma mansoni eggs?

<p>Not described in the text (A)</p> Signup and view all the answers

What is the body site of adult Ankylostoma duodenale?

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

What is the mode of skin penetration by Shistosoma mansoni larva?

<p>Through skin penetration (C)</p> Signup and view all the answers

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