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Metazoa-Helminths: Characteristics and Life Cycle

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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?

Protection and support Signup and view all the answers

How do helminths acquire nutrients?

Through both active ingestion and passive absorption Signup and view all the answers

What is the characteristic of the nervous system in helminths?

Primitive and simple Signup and view all the answers

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

Balantidium coli Signup and view all the answers

What is the primary mode of transmission for Trichomonas vaginalis?

Sexual transmission Signup and view all the answers

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

Giardia lamblia Signup and view all the answers

What is the name of the disease caused by Leishmania?

Leishmaniasis Signup and view all the answers

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

Promastigote Signup and view all the answers

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

24 hours Signup and view all the answers

What is the characteristic symptom of Enterobiasis or pinworm infection?

Anal itching Signup and view all the answers

What is the diagnosis method used for Enterobiasis?

Scotch Tape Method Signup and view all the answers

Which of the following is NOT a symptom of Ankylostomiasis?

Nervousness Signup and view all the answers

What is the characteristic feature of Shistosoma mansoni eggs?

Not described in the text Signup and view all the answers

What is the body site of adult Ankylostoma duodenale?

Intestine Signup and view all the answers

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

Through skin penetration Signup and view all the answers