MICR 202: exercise 2

Question 1

protozoa

Answer 1

unicellular, eukaryotic microorganisms containing at least one nucleus

Question 2

do protozoas have cell walls?

Answer 2

some do (cysts)

Question 3

cyst

Answer 3

resting structure formed by protozoa that does have a cell wall

Question 4

based on _______, protozoa can be divided into four groups.

Answer 4

motility

Question 5

flagellates motile by means of _____

Answer 5

flagella

Question 6

ciliates motile by means of ____

Answer 6

cilia

Question 7

amoeba are motile by means of _____

Answer 7

pseudopods

Question 8

apicomplexans are nonmotile in their ______ forms

Answer 8

mature

Question 9

trypanosoma cruzi (cyst)

Answer 9

causes Chagas’ disease
causes eye infection
“kissing bug”

Question 10

Trichomonas

Answer 10

multiple flagella
undulating membrane (wavy, ribbon-like structure attached to the PM)
do not form cysts

Question 11

trichomonas vaginalis causes_____

Answer 11

trichomoniasis; std

Question 12

cells of Giardia lamblia have ___ nuclei and ___ flagella.

Answer 12

2; 8

Question 13

cells of Giardia lamblia produces a ______ ______ containing 4 nuclei.

Answer 13

quadrinucleate cyst

Question 14

cells of Giardia lamblia may contaminate ____ & cause _____.

Answer 14

H20; giardiasis

Question 15

organisms in the acanthamoeba cause the eye disease _______ ______.

Answer 15

acanthamoeba keratitis

Question 16

apicomplexans: organisms in this group are all _____ ______ _____.

Answer 16

obligate intracellular parasites.

Question 17

describe life cycle of apicomplexans

Answer 17

they have complex life cycles with various stages in more than one host

Question 18

oocyst

Answer 18

encysted apicomplexan zygote in which cell division occurs to form the next stage in the life cycle.

Question 19

how does an oocyst compare to a cyst?

Answer 19

an oocyst is actually part of the life cycle of an organism whereas a cyst is just a resting structure.

Question 20

a member of the genus cryptosporidium causes the waterborne disease ________.

Answer 20

cryptosporidium.

Question 21

organisms belonging to the genus ______ cause the disease malaria.

Answer 21

Plasmodium

Question 22

ring stage

Answer 22

distinctive part of the life cycle which occurs inside human red blood cells.