FIU Parasitology ZOO 4234 Exam II With
Explanations And A Graded
Phylum Platyhelminthes CORRECT ANSWERS Flatworms.
Parasitic.
Acoelomates.
Tripoblastic.
Dorsoventrally flattened- greater S.A to respire by diffusion.
Tegument- surficial covering of multicellular organism
Parenchyma- loosely arranged mass of fibers and cells
Phylum Platyhelminthes- Classes CORRECT ANSWERS Turbellaria.
Trematoda.
Monogenea.
Cestoidea.
Digenea CORRECT ANSWERS Subclass to class Trematoda.
Parasitize all classes of vertebrates.
Develops in at least two hosts.
First host is a mollusk (snail), 2nd is annelid (seg. worm).
Which of the following is not characteristic of digeneans?
a) develops in at least 2 hosts
b) subclass within a trematoda
c) parasitizes all classes of vertebrates
d) first intermediate host is an arthropod
e) none of the above CORRECT ANSWERS D
Which of the following is characteristic of excretion and osmoregulation in digeneans?
a) removal of waste products of metabolism
b) regulation of internal osmotic pressure
c) regulation of internal ionic pressure
d) removal of harmful substances
e) All of the above CORRECT ANSWERS E
Protonephridia CORRECT ANSWERS excretory system that is closed at the inner end
by a flame cell and opens by a pore at the distal end
Flame bulb CORRECT ANSWERS Specialized hollow excretory or osmoregulatory
structure.
Contains a tuft of flagella.
, Flame cell formula CORRECT ANSWERS represents the numbers and arrangements
of flame cells.
Digeneans living in the _____ have no necessity to breach the host tissue.
a) rectum
b) blood vessels
c) lungs
d) intestine CORRECT ANSWERS B
Digeneans living in lungs, intestine, urinary bladder, rectum, and bile ducts draw tissue
into their _______ and use ______ to pump to erode tissue. CORRECT ANSWERS oral
sucker; pharynx
Digenean digestion in most flukes is predominantly extracellular or intracellular?
CORRECT ANSWERS Extracellular
Digenean waste is expelled through: CORRECT ANSWERS Excretory system or
tegument
Stored in worm tightly bound to protein
Periodically regurgitated
Which of the following may be characteristic of the digenean reproductive system?
a) most are hemaphrodites
b) some can self fertalize
c) cross-fertilize if 2 or more are present
d) dioecious is the exception
e) All of the above CORRECT ANSWERS E
Structure analogous to Penis in Male reproductive system of diageneans: (male
copulatory organ) CORRECT ANSWERS Cirrus
Which of the following controls the release of ova from the ovary in digeneans?
a) ootype
b) vitellaria
c) oogenotop
d) ovicapt CORRECT ANSWERS D
Name for vestigial vagina. CORRECT ANSWERS Laurer's canal
Unicellular mucous and serous glands surrounding the ootype: CORRECT ANSWERS
Mehlis' gland
Explanations And A Graded
Phylum Platyhelminthes CORRECT ANSWERS Flatworms.
Parasitic.
Acoelomates.
Tripoblastic.
Dorsoventrally flattened- greater S.A to respire by diffusion.
Tegument- surficial covering of multicellular organism
Parenchyma- loosely arranged mass of fibers and cells
Phylum Platyhelminthes- Classes CORRECT ANSWERS Turbellaria.
Trematoda.
Monogenea.
Cestoidea.
Digenea CORRECT ANSWERS Subclass to class Trematoda.
Parasitize all classes of vertebrates.
Develops in at least two hosts.
First host is a mollusk (snail), 2nd is annelid (seg. worm).
Which of the following is not characteristic of digeneans?
a) develops in at least 2 hosts
b) subclass within a trematoda
c) parasitizes all classes of vertebrates
d) first intermediate host is an arthropod
e) none of the above CORRECT ANSWERS D
Which of the following is characteristic of excretion and osmoregulation in digeneans?
a) removal of waste products of metabolism
b) regulation of internal osmotic pressure
c) regulation of internal ionic pressure
d) removal of harmful substances
e) All of the above CORRECT ANSWERS E
Protonephridia CORRECT ANSWERS excretory system that is closed at the inner end
by a flame cell and opens by a pore at the distal end
Flame bulb CORRECT ANSWERS Specialized hollow excretory or osmoregulatory
structure.
Contains a tuft of flagella.
, Flame cell formula CORRECT ANSWERS represents the numbers and arrangements
of flame cells.
Digeneans living in the _____ have no necessity to breach the host tissue.
a) rectum
b) blood vessels
c) lungs
d) intestine CORRECT ANSWERS B
Digeneans living in lungs, intestine, urinary bladder, rectum, and bile ducts draw tissue
into their _______ and use ______ to pump to erode tissue. CORRECT ANSWERS oral
sucker; pharynx
Digenean digestion in most flukes is predominantly extracellular or intracellular?
CORRECT ANSWERS Extracellular
Digenean waste is expelled through: CORRECT ANSWERS Excretory system or
tegument
Stored in worm tightly bound to protein
Periodically regurgitated
Which of the following may be characteristic of the digenean reproductive system?
a) most are hemaphrodites
b) some can self fertalize
c) cross-fertilize if 2 or more are present
d) dioecious is the exception
e) All of the above CORRECT ANSWERS E
Structure analogous to Penis in Male reproductive system of diageneans: (male
copulatory organ) CORRECT ANSWERS Cirrus
Which of the following controls the release of ova from the ovary in digeneans?
a) ootype
b) vitellaria
c) oogenotop
d) ovicapt CORRECT ANSWERS D
Name for vestigial vagina. CORRECT ANSWERS Laurer's canal
Unicellular mucous and serous glands surrounding the ootype: CORRECT ANSWERS
Mehlis' gland
