Lecture 8 - Protozoa Flashcards
1
Q
- all unicellular and eukaryotic
- all chemoheterotrophs and holozoic
A
protozoa
2
Q
- require organic materials, which may be particulate or in solution
- obtaining nourishment by feeding on plants or other animals
A
holozoic
3
Q
reproduction of protozoa
A
- sexually
- asexually
4
Q
protozoans are mostly
A
aerobic
5
Q
covering of protozoa
A
pellicle
6
Q
where does digestion occur in protozoans
A
vacuoles
7
Q
where does excretion occur in protozoans
A
anal pore
8
Q
vegetative stage which feeds upon bacteria and pariculate nutrients
A
trophozoite
9
Q
some protozoa produce a protectivve capsule under adverse conditions
A
cyst
10
Q
two stages of protozoa
A
- trophozoite
- cyst
11
Q
classification of protozoa based on mode of locomotion
A
- amoeboids
- ciliates
- sporozoa
- flagellates
12
Q
amoeboids
A
pseudopodia
13
Q
ciliates
A
cilia
14
Q
sporozoa
A
non-motile
15
Q
flagellates
A
flagella
16
Q
Protozoans
A
- archaezoa
- apicomplexa
- amoebozoa
- ciliphora
- euglenozoa
17
Q
- lack mitochondria
- spindle shaped
- flagella on front end
- common symbionts in animal GI
A
archaezoa
18
Q
examples of archaezoa
A
- Giardia (diarrhea)
- Trichomonas (STD vaginitis, urethritis)
19
Q
diarrhea
A
Giardia
20
Q
STD vaginitis, urethritis
A
Trichomonas
21
Q
- non motile in mature form
- complex organelles at apex house enzymes
- obligate intracellular parasites
- usually transmitted by insects
- usually complex life cycle with different stages in different hosts
A
apicomplexa
22
Q
example of apicomplexa
A
Plasmodium (malaria)
23
Q
malaria
A
Plasmodium vivax
24
Q
- move via pseudopods
- also referred to as Sarcodina
- binary fission
- most are free-living
- some are pathogenic
A
amoebozoa
25
example of amoebozoa
_Entamoeba_ (amoebic dysentery)
26
amoebic dysentery
_Entamoeba_
27
difference between pathogen and parasite
Pathogen =causes diseases to the host after infection
Parasite = organism that lives on or in another organism of another species
28
- move via cilia
- only one pathogen in group
ciliophora
29
example of ciliophora
_Paramecium_
30
only one pathogen in ciliophora
_Balantidium_ _coli_
31
- move via flagella
- no sexual reproduction
euglenozoa
32
two groups of euglenozoa
1. euglenoids
2. hemoflagellates
33
- have pellicle
- has flagella and eye spot
- has chlorophyll
- photoautotroph or chemoheterotrph
- intermediate between algae and protozoa
euglenoids
34
flagella of euglenozoa
zooflagellates
35
- transmitted by biting insects
- live in host blood
- long slender cells with undulating membrane and flagellum
hemoflagellates
36
example of hemoflagellates
_Trypansoma_ (African sleeping sickness)
37
Euglenoids are sometimes grouped into what
flagellated, unicellular algae
