Difference between revisions of "Helminth Flashcards"

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|<big>'''What are viviparous insects?'''
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|<big>'''What is the difference between a coenurus and a cysticercus?'''
 
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*'''''Lay larvae or nymphs'''''
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*'''''A coenurus is a fluid filled bladder with multiples (dozens) of inverted head attached to the wall'''''
*'''''Eggs rupture in female reproductive system'''''
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*'''''Whereas the cysticercus  has only a single inverted scolex.'''''
 
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Revision as of 20:04, 16 May 2009

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HELMINTHS
WIKIBUGS FLASHCARDS


Cestodes

Question Answer Article
Fill in the missing words about cestodes A cestode (tapeworm) is a chain (strobila) of progressively maturing reproductive units called proglottids anchored at one end to the intestinal wall by a hold-fast organ called the scolex. Link to Answer Article
What species of Taenia occur in dogs?
  • Taenia ovis
  • Taenia hydatigena
  • Taenia pisiformis
  • Taenia multiceps
  • Taenia serialis
Link to Answer Article
What are the more obvious morphological features of the scolex of a cyclophyllidean tapeworm?
  • Four suckers
  • Rostellum with rows of large hooks
  • Unsegmented neck (behind the scolex) which gives rise to new segments
Link to Answer Article
Describe the features of a cysticercus
  • Fluid filled bladder, containing a single invaginated head (protoscolex) - seen as a white blob on the wall of the cyst
Link to Answer Article
In which host(s) would you expect to find the cysticercus of T. hydatigena and where in the host might it be found?
  • Sheep (mostly)'
  • Cattle
  • Pigs
  • Found in the peritoneal cavity
Link to Answer Article
What is the difference between a coenurus and a cysticercus?
  • A coenurus is a fluid filled bladder with multiples (dozens) of inverted head attached to the wall
  • Whereas the cysticercus has only a single inverted scolex.
Link to Answer Article
Summarise simple metamorphosis and give an example of a species of insect which uses it
  • Nymph emerges from egg
  • Nymph grows and moults
  • Nymph becomes an adult
  • Lice
Link to Answer Article
Summarise complex metamorphosis and give an example of a species of insect which uses it
  • Larva emerges from egg
  • Larva grows and moults
  • Larva pupates
  • Adult emerges from pupa
  • Flies
Link to Answer Article