Micro 5: Protozoa Flashcards Preview

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Flashcards in Micro 5: Protozoa Deck (19)
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1
Q

describe protozoa basic characteristics

A
  • unicellular eukaryotes
  • inhabit water and soil
  • animal like nutrition
  • complex life cycles
2
Q

what is the feeding and growing form of protozoa

A

trophozoite

3
Q

what is schizogony

A

multiple fission

4
Q

asexual reproduction in protozoa includes

A

fission, budding, or schizogony

5
Q

sexual reproduction in protozoa is by

A

conjugation

6
Q

some protozoa can produce a ____ to survive adverse conditions

A

cyst

7
Q

what outer protective particle can protozoa have

A

may have an outer protective pellicle, requiring specialized structures to take in food

8
Q

what specialized structures in protozoa would be needed if it had an outer protective pellicle

A
  • ciliates wave cilia toward mouthlike cytosome

- amebae phagocytize food

9
Q

how is food digested/ waste eliminated in protozoa

A
  • food is digested in vacuoles

- wastes eliminated through an anal pore

10
Q

list of medically important protozoa

A
  1. feeding grooves (diplomonads, parabasalids, euglenozoa)
  2. amebae
  3. apicomplexia
  4. ciliates
11
Q

feeding grooves:

diplomonads

A
  • no mitochondria, multiple flagella

- giardia intestinalis, giardiasis

12
Q

feeding grooves:

parabasalids

A
  • undulating membrane, no cyst stage

- trichonomas vaginalis, trichomoniasis

13
Q

feeding grooves:

euglenozoa

A

-photoautotrophs or facultative chemotrophs

hemoflagellates

14
Q

hemoflagellates

A

transmitted by bites of blood-feeding insects

15
Q

amebae move by

A

move by pseudopods

16
Q

3 amebae and what diseases they cause

A
  1. entamoeba histolytica- causes amebic dysentery
  2. acanthamoeba- infects corneas and causes blindness
  3. balamuthia- granulomatous amebic encephalitis
17
Q

features of apicomplexia

A
  • nonmotile
  • obligate intracellular parasites
  • complex life cycles
18
Q

list of 3 examples of apicomplexia and diseases they cause

A
  1. toxoplasma gondii- transmitted by cats, causes fetal infections
  2. cryptosporidium- transmitted by feces, causes waterborne illness
  3. plasmodium-causes malaria
19
Q

plasmodium important facts

how do you get it

A
  • causes malaria
  • sexually reproduces in the Anopheles mosquito
  • a mosquito injects a sporozoite into its bite, and the sporozoite undergoes schizogony in the liver, merozoites are produced
  • merozoites infect red blood cells, forming a ring stage inside cell
  • red blood cells rupture, and meroziotes infect new red blood cells