ZOO 4234 Parasitology Exam 3 Final - Questions and Answers (Florida International University)

Parasitology Exam 3 Final


2) Which of the following is affected by the hydrostatic skeleton in nematodes?
a) locomotion d) gamete formation
b) feeding e) all of the above
c) reproduction


4) Which nematode species covered can cause hanging groin and elephantiasis?
a) Strongyloides stercoralis d) Onchocerca volvulus
b) Trichinella spiralis e) none of the above
c) Ascaris lumbricoides


6) Which of the following is not a characteristic of the secretory-excretory system in nematodes?
a) 2 long canals in lateral hypodermis d) presence of excretory pore
b) flame cells e) none of the above
c) excretion occurs via intestine

7) What determines whether Strongyloides stercoralis undergoes a free living mode in females?
a) temperature > 33C d) high relative humidity
b) low relative humidity e) none of the above
c) temperature < 34C


9) Which nematode species covered can utilize a human as both intermediate and definitive host?
a) Ascaris lumbricoides d) Onchocerca volvulus
b) Trichinella spiralis e) none of the above
c) Trichuris trichiura


14) Which of the following is not an epidemiological characteristic of Trichinella spiralis?
a) eating infected pork d) ingesting beetle
b) human not important for life cycle e) none of the above
c) zoonotic disease

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16) Which nematode species covered can cause rectal prolapse?
a) Trichinella spiralis d) Strongyloides stercoralis
b) Ascaris lumbricoides e) none of the above
c) Trichuris trichiura

17) Which of the following is not a characteristic of nematodes?
a) bilaterally symmetrical d) dioecious
b) syncytial tegument e) all of the above
c) pseudocoelomate

, 22) Which of the following is an epidemiological factor for human infection with Ochocerca volvulus?
a) clear, slow running water d) presence of black fly
b) presence of blowfly e) none of the above
c) murky, fast running water


24) Which of the following helps to ensure food moves through the digestive system in nematodes?
a) hydrostatic pressure d) posterior bulb
b) newly ingested food e) all of the above
c) locomotion

25) Which of the following is not characteristic of the life history of Trichinella spiralis?
a) intracellular parasite d) copulation within the mucosal epithelium
b) viviparous e) none of the above
c) nurse cell




29) Which of the following is an epidemiological factor for Strongyloides stercoralis?
a) J3s in contaminated soil d) presence of dogs and cats
b) low sanitation standards e) all of the above
c) transmammary infection

30) Which component is responsible for the S-shaped locomotion seen in nematodes?
a) lateral somatic muscle d) longitudinal somatic muscle
b) circular somatic muscle e) none of the above
c) smooth muscle

31) Which of the following parasitic infections cannot occur via mechanical vector?
a) Trichinella spiralis d) Trichuris trichiura
b) Ascaris lumbricoides e) none of the above
c) Taenia solium

32) Which of the following is not a functional component of the nematode hydrostatic skeleton?
a) somatic musculature d) hemolymph
b) cuticle e) none of the above
c) microtriches

33) Which of the following is not capable of autoinfection?
a) Hymenolepis nana d) Taenia solium
b) Strongyloides stercoralis e) all of the above
c) Trichuris trichiura

34) Which of the following is not characteristic of male nematodes?
a) males are generally smaller d) spermatozoa use pseudopodium
b) tail of males are more curled e) none of the above
c) males have cloaca

35) How many molts take place before Strongyloides stercoralis reaches the J3 infective stage?
a) 1 molt d) 4 molts
b) 2 molts e) none of the above