Cestoda = Tapeworms: General Characteristics

Question 1

1. What is the narrowest part of the worm?
   a. Anterior end
   b. Neck
   c. Posterior end
   d. Midgut

Answer 1

b. Neck

Question 2

2. Which of the following is NOT true of the Cestoda tegument?
   a. Lined with microvilli
   b. Functions in nutrient absorption
   c. Lacks muscles
   d. Includes a glycocalyx

Answer 2

c. Lacks muscles

Question 3

3. Cestodes have a well developed nervous system
   True
   False

Answer 3

True

Question 4

4. How many suckers do Acetabulate tapeworm heads have?
   a. 5
   b. 2
   c. 1
   d. 4

Answer 4

d. 4

Question 5

5. Which structure is the head of a tapeworm?
   a. Scolex
   b. DVM
   c. Proglottids
   d. Strobila

Answer 5

a. Scolex

Question 6

6. Which of the following statements is false?
   a. Cestodes’ morphology consists of three parts: scolex, neck, and strobita.
   b. Tapeworms lack a mouth and a digestive tract.
   c. Tegument plays a role in the worms’ reproduction.
   d. Proglottid has male and female organs.

Answer 6

c. Tegument plays a role in the worms’ reproduction.

Question 7

7. Oncosphere is the embryo equipped with hooks and will give rise to larval form.
   True
   False

Answer 7

True

Question 8

8. The two morphological forms of cestodes’ scolex are:
   a. acetabulate and bothriate
   b. acetabulate and lipricate
   c. bothriate and lipricate
   d. lipricate and rostellate

Answer 8

a. acetabulate and bothriate

Question 9

9. What is the layer between outer envelope and inner envelope in cestodes’ egg?
   a. oncosphere
   b. parenchyma
   c. endothelium
   d. embryophore

Answer 9

d. embryophore

Question 10

10. What is the mechanism used by tapeworms that lack a mouth to absorb nutrients?
    a. Diffusion
    b. Endocytosis
    c. Transfection
    d. Generating electrical potential

Answer 10

a. Diffusion

Question 11

11. Cestodes belong to the phylum Platyhelminthes (roundworms).
    True
    False

Answer 11

False

Question 12

12. The Class Cestoidea in the Phylum Platyhelminthes is also known as
    a. roundworms
    b. flukes
    c. trematodes
    d. tapeworms

Answer 12

d. tapeworms

Question 13

13. Where can the stem cells that give rise to tapeworms’ proglottids be found?
    a. scolex
    b. tail
    c. neck
    d. strobita

Answer 13

c. neck

Question 14

14. What are the two classes of flatworms (Phylum Platyhelminthes)?
    a. Trematoda and Nematoda
    b. Trematoda and fluke
    c. Trematoda and Cestoidea
    d. Nematoda and Cestoidea

Answer 14

c. Trematoda and Cestoidea

Question 15

15. What serves as the major interface between Cestodes and their hosts?
    a. parenchyma
    b. scolex
    c. tegument
    d. proglottids

Answer 15

c. tegument

Question 16

16. What is the difference between anapolytic and apolytic worms?
    a. In anapolytic worms, eggs exit through the uterine pore.
    b. In apolytic worms, eggs exit through the uterine pore.
    c. In anapolytic worms, the entire gravid proglottid is released.
    d. none of the above

Answer 16

a. In anapolytic worms, eggs exit through the uterine pore.

Question 17

17. If there is more than one worm that is 25 m long in your intestinal tract, then there is not much room for food.
    True
    False

Answer 17

True

Question 18

18. For which kind of reproduction are proglottids used?
    a. sexual reproduction
    b. asexual reproduction
    c. both A & B
    d. none of the above

Answer 18

b. asexual reproduction

Question 19

19. The hook at the anterior end of cestodes:
    a. is fixed
    b. is retractable
    c. can be fastened during certain time intervals
    d. falls off once contact with the host is made

Answer 19

b. is retractable

Question 20

20. What is the hollow space where cestodes house their reproductive organs?
    a. oncosphere
    b. parenchyma
    c. endothelium
    d. embryophore

Answer 20

b. parenchyma

Question 21

21. Which of the following structure counteracts the effect of all the enzymes from the host that attack the cestode?
    a. Golgi apparatus
    b. Ribosome
    c. Glycocalyx
    d. Lysosome

Answer 21

c. Glycocalyx

Question 22

22. Tegumental and parenchymal musculature is:
    a. Circular and lateral
    b. Ovoidal and lateral
    c. Circular and longitudinal
    d. Ovoidal and longitudinal

Answer 22

c. Circular and longitudinal

Question 23

23. Cestodes have ___ to ensure close contact during reproduction.
    a. Pili
    b. Cilia
    c. Spikes
    d. Pseudopods

Answer 23

c. Spikes

Question 24

24. Which of the following structures are lined with microvilli?
    a. Golgi apparatus
    b. Glycocalyx
    c. Microthrix
    d. Scolex

Answer 24

b. Glycocalyx

c. Microthrix

Question 25

25. One major role of the tegument is to ensure nutrient uptake. True False

Answer 25

True

Question 26

26. Proglottids require two separate worms for mating to occur. True False

Answer 26

False

Question 27

27. What was a very common misconception about tapeworms? a. That despite having no mouth, they consume a lot of food. b. That despite having no digestive tract, they’re very efficient at processing nutrients. c. That tapeworms are only found in people who don’t eat a lot. d. That tapeworms are, in actuality, very limited in how much food they can intake.

Answer 27

a. That despite having no mouth, they consume a lot of food.

Question 28

28. What are the segments of the worm that make up the strobila called? a. scolex b. proglottids c. tegument d. glycocalyx

Answer 28

b. proglottids

Question 29

29. Most of the treatment drug targets in Cestodes will be in the neck region, due to the fact that development of the worms are propelled by cells there. True False

Answer 29

True

Question 30

30. Where would you find maturely developed sexual organs in Cestodes? a. the neck b. the anterior proglottids c. the scolex d. the posterior proglottids

Answer 30

d. the posterior proglottids

Question 31

31. Match the type of egg with its right characteristics. [have outer shell and all other layers] 1. Pseudophyllidean egg [have only a thick outer envelope] 2. Dipylidean egg [embryophore will be the outermost covering] 3. Taenoid eggs

Answer 31

[have outer shell and all other layers] 1. Pseudophyllidean egg [have only a thick outer envelope] 2. Dipylidean egg [embryophore will be the outermost covering] 3. Taenoid eggs

Question 32

32. The infective form of Pseudophyllidean (the form that infects definitive mammalian hosts) are: a. plerocercoids b. procerciods c. coracidia d. larva

Answer 32

a. plerocercoids

Question 33

33. Which type of host would be better for a human to be used as by a Cestode? a. intermediate b. definitive c. both d. neither

Answer 33

b. definitive

Question 34

34. What affects the morphology of the worm as they develop from the egg stage to the larval form? a. type of host they use for the intermediate (vertebrate vs invertebrate) b. the place the eggs go to live inside of their intermediate host c. the place the eggs are expelled to immediately after being released from the worm d. the age of the human that they use for an intermediate host

Answer 34

a. type of host they use for the intermediate (vertebrate vs invertebrate)

Question 35

35. Cestodes are multi-segmented and can be up to 25 m long. True False

Answer 35

True

Question 36

36. The morphological form, acetabulate, of the cestode’s scolex has two, four, or six longitudinally arranged shallow depressions True False

Answer 36

False

Question 37

37. In invertebrate hosts, the oncosphere of a Cyclophyllidean enters the hemocoel and metamorphoses into a cysticercus. True False

Answer 37

False

Question 38

38. Apolytic worms have no uterine pore. True False

Answer 38

True

Question 39

39. Humans are rarely infected with multiple worms. True False

Answer 39

True