Trematodes and Their Life Cycle
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Questions and Answers

Where are the eggs of tapeworms usually found?

  • Gravid segments (correct)
  • Digestive system
  • Mature segments
  • Circulatory system

What is the mode of nutrition for tapeworms?

  • Eating solid food particles
  • Nutrition absorbed through body wall (correct)
  • Absorbing nutrition from the circulatory system
  • Using a digestive system

Which system in tapeworms is responsible for excretion?

  • Excretory system with flame cells (correct)
  • Reproductive system
  • Circulatory system
  • Digestive system

What is a common feature of the reproductive system of cestodes?

<p>Having multiple testes and a bilobed ovary (D)</p> Signup and view all the answers

Where do the ducts of testes and ovary open in cestodes?

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

Which larval stage of cestodes is considered infective for most species?

<p>Cystic larval stage (B)</p> Signup and view all the answers

What is the main difference between Schistosoma eggs and eggs of other trematodes?

<p>Schistosoma eggs are operculated, unlike other trematode eggs. (B)</p> Signup and view all the answers

Which larval stage of trematodes is characterized by having a cylindrical larva with a collar structure?

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

What is the final larval stage inside the snail for Schistosoma?

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

Which host is needed for the asexual cycle of trematodes to begin in soft tissues?

<p>Intermediate host (snail) (B)</p> Signup and view all the answers

The lack of a circulatory system is a characteristic feature of:

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

Which stage serves as the infective stage for schistosomes?

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

What is the life cycle stage of cestodes that is responsible for causing significant morbidity and mortality among humans in underdeveloped countries?

<p>Cystic larva (D)</p> Signup and view all the answers

Why are cestode infections emerging as an important cause of diseases in industrialized countries?

<p>Mainly in rural areas and among immigrants (C)</p> Signup and view all the answers

What percentage of global disability-adjusted life years (DALYs) lost do cestode zoonoses account for among all neglected zoonotic diseases?

<p>Over 75% (C)</p> Signup and view all the answers

What country was the 68-year-old man from when he moved to the United States?

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

What did the physician detect during the routine physical examination of the 68-year-old man?

<p>Enlarged liver (D)</p> Signup and view all the answers

What radiological study was ordered after the physician detected a mass in the right upper quadrant of the abdomen?

<p>Ultrasound of the liver (A)</p> Signup and view all the answers

What is the main function of protozoa?

<p>Reproduction, digestion, excretion, respiration, etc. (D)</p> Signup and view all the answers

What was found in the stool examination of the 34-year-old man with fever and crampy abdominal pain?

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

Which resource would be most helpful for detailed information on diagnostic parasitology?

<p>Paniker's Textbook of Medical Parasitology, 8th ed. (D)</p> Signup and view all the answers

What is characteristic of the Plasmodium falciparum parasite?

<p>Presence in blood causing malaria (B)</p> Signup and view all the answers

What would be an essential focus area when studying Medical Protozoology?

<p><strong>Life cycle</strong> of protozoa (C)</p> Signup and view all the answers

What is the function of the ectoplasm in protozoa?

<p>Serves as an organ for locomotion and food engulfment (D)</p> Signup and view all the answers

What is the main function of the endoplasm in protozoa?

<p>Contains the nucleus, golgi bodies, and endoplasmic reticulum (C)</p> Signup and view all the answers

How many nuclei can some species of protozoa have in a single cell?

<p>100 (A)</p> Signup and view all the answers

What does the nucleus of protozoa contain?

<p>Nucleoli or a central karyosome (B)</p> Signup and view all the answers

Which part of protozoa is responsible for nutrition and reproduction?

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

What is the significance of the nucleus in protozoa?

<p>Regulates cell activity &amp; reproduction (A)</p> Signup and view all the answers

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