538 GENERAL CONSIDERATION OF PROTOZOA 



budding. This subphylum is of little importance from the standpoint 

 of the pathologist. One species only must be considered, namely 

 Balantidium coli, and this is of doubtful pathogenic importance. 



The subphylum sporozoa comprises parasitic protozoa without 

 motile organs, but which are capable of moving from place to place 

 by structural modification of one kind or other. This subphylum is, 

 again, of great importance, because it includes pathogenic coccidia, 

 the malarial organisms of man and birds, and the piroplasma which 

 cause Texas fever in cattle and other animal piroplasmoses. 



QUESTIONS 



1. Give a definition of the phylum protozoa. 



2. Where do they occur? 



3. What is their general morphology? 



4. Compare the individual variability in bacteria and protozoa. 



5. Define the terms spongioplasm, hyaloplasm, ectoplasm, entoplasm. 



6. What are plastids and chromatophores ? 



7. Define the terms macronucleus, micronucleus, trophonucleus, karyogonad, 

 chromatin, kinoplasm, archoplasm. 



8. What are the various organs of locomotion found in protozoa? 



9. Define the terms lobopodia, filopodia, actinopodia, cilia. 



10. Describe the simplest form of reproduction in protozoa. 



11. What is meant by mitotic, what by amitotic nuclear division? 



12. What is karyomitosis ? 



13. What are chromosomes? What centrosomes? What the achromatic 

 spindle ? 



14. What is a blepharoblast ? 



15. What is autogamy or automyxis? 



16. What are chromidia or idiochromidia ? 



17. What is endogamy? 



18. What is exogamy? 



19. What are gametes? 



20. What is isogamy, what anisogamy? 



21. What are sporozoites ? What merozoites? 



22. What is a sporoblast, what a schizont? 



23. Name the different forms of reproduction which occur among protozoa. 



24. Discuss the metabolism of protozoa. Can they ever use simple compounds 

 as food ? 



25. Discuss organs of locomotion with reference to food supply. 



26. Discuss intracellular digestion by protozoa. 



27. Give the characteristics of the subphylum sarcodina and name some 

 pathogenic microorganisms belonging to this subphylum. 



28. Give the same with reference to the subphylum mastigophora. 



29. Give the same with reference to the subphylum infusoria. 



30. Give the same with reference to the subphylum sporozoa. 



