amoeba 11 study questions

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Amoeba Study Questions Page 11CLS 419 Student Laboratory

Parasitology - AmoebaStudent Lab Study Questions

Multiple Answer(circle all of the correct responses):1. Identify the criteria used to identify the intestinal protozoa Amoeba.

a. Unicellular organism

b. Multi-celled organismc. Trophozoite form has locomotion by extension of pseudopodiad. Trophozoite form has locomotion by flagellae. Cyst form is sphericalf. Cyst form is amoeboid-shapedg. Cyst form has only one nucleush. Cyst form has 1, 2, 4, or 8 nuclei

2. Identify the morphologic differences between cysts and trophozoites.a. Cysts have 1, 2, 4, or 8 nucleib. Trophozoites have up to 8 nucleic. Cysts are sphericald. Trophozoites are sphericale. Trophozoites are motilef. Cysts are motile

Multiple Choice (select the one best answer):3. What key morphologic criteria is/are used to definitively identify Entamoeba histolytica trophozoites?

a. Unidirectional motilityb. Karyosome is eccentric in nucleusc. Ingested RBCsd. Both A and Ce. Both B and C

4. What genus has a nucleus that has a single karyosome located centrally or an eccentrically placedkaryosome surrounded by a nuclear membrane on which is deposited a distinct ring of peripheralchromatin?

a. Endolimaxb. Entamoebac. Iodamoebad. Blastocystis

5. How is Entamoeba hartmanni differentiated fromEntamoeba histolytica?a. Sizeb. Appearance of nucleusc. Presence/absence of ingested RBCsd. Both A and Ce. Both B and C

6. The most prominent diagnostic feature seen in the cyst ofIodamoeba butschlii is a/n

a. Peripheral chromatinb. Centrally located karyosomec. Ingested RBCd. Glycogen vacuole


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7. What parasite is the only intestinal amoeba that is pathogenic and causes amoebic dysentery?a. Entamoeba hartmannib. Entamoeba histolyticac. Entamoeba colid. Endolimax nana

Matching: (single answer may be used more than once)8. Match the free-living amoeba with its description.

_____ Causes corneal ulcerations that can lead to blindness

_____ Causes meningoencephalitis, which is usually fatal

_____ Life cycle stages include: trophozoite, cyst and flagellate

_____ Cyst stage has double-layered, polygonal walls that giveclusters of cysts the appearance of a honeycomb

a. Acanthamoebab. Naegleria

Matching: Match the picture of the amoeba with its identification (please pay close attention to keydifferentiating characteristics):

9. Identify these trophozoites taking note of differing characteristics.

_____ Entamoeba histolytica

_____ Entamoeba coli

_____ Entamoeba hartmanni

_____ Iodamoeba butschlii

_____ Endolimax nana

a. b. c.

d. e. f.

8 m

45 m

18 m

5 m

15 m

50 m

Copyright University of Nebraska 2011



Copyright University of Nebraska 2011 Copyright University of Nebraska 2011



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10. Identify these cysts taking note of differing characteristics.

_____ Entamoeba histolytica

_____ Entamoeba coli

_____ Entamoeba hartmanni

_____ Iodamoeba butschlii

_____ Endolimax nana

_____ Blastocystis hominis

a. b.

c. d.

e. f.

15 m

21 m

7 m

18 m

5 m35 m





Copyright University of Nebraska 2011Copyright University of Nebraska 2011

amoeba 11 study questions

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