Vocabulary - Platyhelminthes

Question 1

1. Which of the following is true about class Trematoda?
   a. Only parasitic as endoparasites
   b. Are segmented into three cavities
   c. Parasitic only on invertebrates
   d. Can be endoparasites or ectoparasites

Answer 1

d. Can be endoparasites or ectoparasites

Question 2

2. What does it mean that the tegument is syncytial?
   a. May contain spines
   b. Contains ridges
   c. No membrane between cells
   d. Outer surface is a glycocalyx

Answer 2

c. No membrane between cells

Question 3

3. The outer covering of the worms is called a:
   a. tegument
   b. syncytial
   c. protonephridia
   d. ectoplasm

Answer 3

a. tegument

Question 4

4. What is the function of the protonephridia?
   a. Asexual reproduction
   b. Nerve transmission
   c. Particle ingestion
   d. Excretion

Answer 4

d. Excretion

Question 5

5. High fecundity was a characterization of many flukes, and means:
   a. The ability of the fluke to quickly move about
   b. The ability of the fluke to rapidly infect a host animal
   c. The ability of the fluke to produce many eggs in one reproductive cycle
   d. The ability of the fluke to engage in many ways of reproduction (cross-fertilization and self-fertilization)

Answer 5

c. The ability of the fluke to produce many eggs in one reproductive cycle

Question 6

6. Nerve connection sites through the fluke body are called {}.

Answer 6

commissures

Question 7

7. The following system is completely developed in flukes:
   a. digestive
   b. skeletal
   c. circulatory
   d. reproductive

Answer 7

d. reproductive

Question 8

8. {} accessibility is crucial for flukes to become endemic in an area.

Answer 8

Snail | Gastropod

Question 9

The class Cestoidea includes flukes and the class Trematoda includes tapeworms.
True
False

Answer 9

False

Question 10

Class Trematoda lacks true segmentation, while class Cestoidea has segmentation.
True
False

Answer 10

True

Question 11

11. Which of the following refers to the cover from which larval form emerges?
    a. fecundity
    b. operculum
    c. cercaria
    d. none of the above

Answer 11

b. operculum

Question 12

12. Miracidium is a larval stage in the development of
    a. Taenia solium
    b. Fasciola hepatica
    c. Ascaris
    d. Echinococcus

Answer 12

b. Fasciola hepatica

Question 13

13. Platyhelminthes are best described as which of the following:
    a. flatworms, diploblastic, acoelomates
    b. flatworms, triploblastic, coelomates
    c. flatworms, triploblastic, acoelomates
    d. flatworms, triploblastic, pseudocoelomates

Answer 13

c. flatworms, triploblastic, acoelomates

Question 14

14. Sporocyst divide by polyembryony, which is sexual reproduction.
    True
    False

Answer 14

False

Question 15

15. Metacercaria is a larval stage that is usually found on vegetation so it can be easily acquired when you eat.
    True
    False

Answer 15

True

Question 16

16. Which of the following is true about miracidium?
    a. ciliated
    b. can swim
    c. refers to the larvae stage
    d. A, B
    e. A, B, C

Answer 16

e. A, B, C

Question 17

17. In Platyhelminthes, flame cells are components of the which system?
    a. nervous system
    b. respiratory system
    c. reproductive system
    d. excretory system

Answer 17

d. excretory system

Question 18

18. In Platyhelminthes, their nervous system is described as “ladder-like,” because their nerves are __ and ___

Answer 18

{longitudinal | transverse} and {longitudinal | transverse}

Question 19

19. What name is given to cells that secrete mucus in the epidermis of the Turbellaria?
    a. cuticle cells
    b. parenchyma
    c. teguments
    d. rhabdites

Answer 19

d. rhabdites

Question 20

20. In platyhelminthes, the microtubules comprising the axonemes of a mature biflagellated sperm cell are arranged in which order?
    a. 7 + 2
    b. 9 + 1
    c. 9 + 2
    d. 8 + 1

Answer 20

b. 9 + 1

Question 21

21. What are the light-sensitive organs in flatworms called?
    a. ocelli
    b. auricles
    c. statocysts
    d. rheoreceptors

Answer 21

a. ocelli

Question 22

22. The flatworm nervous system contains sensory, motor, and association nerves, and is organized into which pattern?
    a. spinal cord
    b. ladderlike
    c. nerve net
    d. cicularlike
    e. I don’t know

Answer 22

b. ladderlike

Question 23

23. Which of the following are Digenea habitats?
    a. Muscular system
    b. Biliary system
    c. Urinary System
    d. All of the above

Answer 23

d. All of the above

Question 24

24. Which of the following correctly describes a prepatent period?
    a. The time before a host develops symptoms
    b. From the time the miracidia hatches to the time it penetrates a snail host
    c. From the time metacercaria is taken up to the time of passage of eggs in feces
    d. The time it takes for free-swimming cercariae to transform into for metacercariae

Answer 24

c. From the time metacercaria is taken up to the time of passage of eggs in feces

Question 25

25. In Platyhelminthes, what polymer reinforces the mesenchyme? a. Cellulose b. Pseudopeptidoglycan c. Chitin d. Collagen

Answer 25

d. Collagen

Question 26

26. All of the following characteristics are true about Phylum Platyhelminthes except: a. no body cavity b. hermaphroditic c. two body cavities d. dorsoventrally flattened

Answer 26

c. two body cavities