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PARASITOLOGY > LESSON 2: NEMATODES > Flashcards

LESSON 2: NEMATODES Flashcards

1
Q

TRUE OR FALSE:
Are Nematodes roundworms?

A

TRUE

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2
Q

What is the general morphology of Phylum Nematoda?

A

Unsegmented, elongated and cylindrical in shape

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3
Q

Phylum Nematoda:
The body is covered by a _________ which may be ____________, __________ or __________

A

non-nucleated
cuticle
smooth striated, bossed or ornamented
with spines

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4
Q

TRUE OR FALSE:
Phylum Nematoda are long, cylindrical and unsegmented

A

TRUE

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5
Q

Phylum Nematoda:
Body Cavity is called _______

A

Pseudocoele

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6
Q

This contains the viscera (digestive, reproductive and parts of the nervous and excretory systems)

A

Pseudocoele

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7
Q

Phylum Nematoda:
mouth/buccal cavity which may be provided
with spines, hooks, cutting plates, stylets, or other structures
for attachment or penetration

A

Anterior end

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8
Q

What is the length of Phylum Nematoda?

A

mm to a meter in length

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9
Q

What is the movement of Phylum Nematoda?

A

sinuous changes of their bodies

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10
Q

TRUE OR FALSE:
The sexes are ______, and the females are ______ than the males.

Male posterior end is usually _______

A

Separate
Larger
Curved

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11
Q

Enumerate the reproductive system of the male in Phylum Nematoda

A

Male: testes, vas deferens, seminal vesicle, ejaculatory duct,
cloaca

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12
Q

Enumerate the accessory copulatory apparatus for Male Reproductive System:

A

a. gubernaculum (wing- like appendage)
b. telamon
c. copulatory spicule
d. copulatory bursa (umbrella like ex:
Hookworms)

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13
Q

It has a wing like appendage

A

Gubernaculum

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14
Q

It is an umbrella shape such as Hookworms

A

Copulatory bursa

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15
Q

TRUE OR FALSE:
Female reproductive system of the Phylum Nematoda may be single or bifurcated?

A

True

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15
Q

TRUE OR FALSE:
Female reproductive system of the Phylum Nematoda may be single or bifurcated?

A

True

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16
Q

Enumerate the Female Reproductive System

A

Ovary, oviduct, seminal receptacle, uterus,
ovijector, and vagina

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17
Q

For Female Adults:
a. lay an ova
b. larvae
c. _______

A

a. Oviparous
b. viviparous / larviparous
c. parthogenetic

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18
Q

What system has a complete alimentary tract?

A

Digestive System

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19
Q

The buccal cavity in the digestive system comprises of?

A

Spines, hooks, cutting plates and teeth

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20
Q

Digestive System: ESOPHAGUS
__________ , __________ , __________ , __________ , or
__________ ,

A

filariform, rhabditiform, spiruroid, strongyliform or stichosoma

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21
Q

What system has chemoreceptors?

A

Nervous system

22
Q

excitatory neurotransmitter

A

Acetyl choline

23
Q

inhibitory
neurotransmitter

A

Gamma-amino butyric acid (GABA)

24
Q

NERVOUS SYSTEM:
Most nematocidal drugs interfere with _______________

A

neurotransmission

25
Q

What are the 2 classifications of the Nervous System?

A

Amphids
Phasmids

26
Q

A pair of laterally placed minute receptor organs in the cephalic or cervical region of all nematodes

A

AMPHIDS

27
Q

A pair of minute lateral post-anal organs in species w/o caudal glands

A

PHASMIDS

28
Q

EXCRETORY SYSTEM:
with ___________ or __________ & an _____________

A

Collecting tubules
Collecting canal
Excretory pores

29
Q

TRUE OR FALSE:
Phylum Nematoda has no circulatory system?

A

True

30
Q

NO CIRCULATORY SYSTEM
a. fluid of the body cavity contains ________, _______, ______, _______ and ______

b. fulfills the functions of the _______

A

a. hemoglobin, glucose,
proteins, salts and vitamins

b. blood

31
Q

TRUE OR FALSE:
Phylum Nematoda has no respiratory system?

A

True

32
Q

Enumerate the developmental stages for Phylum Nematoda

A

1) egg stage
2) four larval stages
3) adult stage

33
Q

MODES OF ATTACHMENT:
Example of Anchorage with attenuated ends

A

T. trichiura

34
Q

MODES OF ATTACHMENT:
Example of Oral attachment to the mucosa

A

Ancylostoma

35
Q

MODES OF ATTACHMENT:
Example of Oral attachment to the mucosa

A

Ancylostoma

36
Q

MODES OF ATTACHMENT:
Example of Penetration of the tissues

A

Strongyloides

37
Q

MODES OF ATTACHMENT:
Example of Retention in the folds of the mucosa

A

Lumcricoides

38
Q

MODES OF NOURISHMENT:
By sucking with ___________ of _______

A

ingestion of blood

39
Q

MODES OF NOURISHMENT:
By ingestion of ________ and blood by embedded worms. An example of ____________

A

lyzed tissues
L. trichuris

40
Q

MODES OF NOURISHMENT:
By feeding with intestinal contents. An example of ___________

A

A. lumbricoides

41
Q

MODES OF NOURISHMENT:
By deriving from ________. An example of _________

A

Body fluids
Filarial worms

42
Q

What is the lifespan of:
1) Trichinella spiralis

2) Enterobius vermicularis

3) lumbricoides

4) Hookworms

5) Filarial worms

6) T. trichiura

7) S. stercoralis

A

1)Trichinella spiralis: 4 – 16 weeks

2) Enterobius vermicularis: 1 – 2 months

3) lumbricoides: 12 – 17 months

4) Hookworms: at least 14 years

5) Filarial worms: up to 25 years

6) T. trichiura: 5 – 10 years

7) S. stercoralis: 20 – 30 years

43
Q

What are the 3 layers of Nematodes Egg?

A

o Vitelline membrane
o Chorionic or true shell
o Albuminous covering

44
Q

These parasites that has a complete layers are the
________ and ______

A

Ascaris and Trichuris

45
Q

What are the four larval stages?

A

L1, L2, L3, L4

46
Q

What class of nematodes lack “Phasmids” or without caudal chemoreceptors

A

Aphasmidia

47
Q

Class: Aphasmidia
What are the 2 species which parasitize the small intestine?

A

a. Trichinella spiralis
b. Capillaria philippinensis

48
Q

Class: Aphasmidia
What species which parasitize the large intestine?

A

Trichuris trichiura

49
Q

What class of nematodes is with Phasmids?

A

Phasmidia

50
Q

Class: Phasmidia
What species which parasitize the small intestine?

A

a. Ascaris lumbricoides
b. Necator americanus
c. Ancylostoma duodenale
d. Ancylostoma ceylanicum
e. Strongyloides stercoralis

51
Q

Class: Phasmidia
What species which parasitize the large intestine?

A

Enterobius vermicularis

52
Q

Class: Phasmidia
What species which parasitize the tissues?

A

a. Wuchereria bancrofti
b. Brugia malayi
c. Loa loa
d. Dracunculus medinensis

53
Q

Class: Phasmidia
What species causes larva migrans in man?

A

a. Ancylostima braziliense
b. Ancylostoma caninum
c. Toxocara spp

PARASITOLOGY (5 decks)

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