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PH 172 > Intro To Nematodes > Flashcards

Intro To Nematodes Flashcards

0
Q

Nematode have this body cavity with no cell lining

A

Pseudocoelom

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1
Q 
False about nematodes
A. Unsegmented sila
B. Bilaterally symmetrical
C. Incomplete digestive tract
D. Separate sexes only at adulthood
E. Gas exchange happens via diffusion
A

C. Complete kasi digestive tract nila

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2
Q

Fluid inside pseudocoelom of nematodes, aids in movement along musculature

A

Hemolymph

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3
Q

Nematodes excrete waste thru this hole

A

Excretory pore

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4
Q

Female nematodes only have one uterus. True or false?

A

False, they have a pair of uteri

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5
Q

Glycogen is the main storage polysaccharide of nematodes. True or false?

A

True

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6
Q 
Which is false?
A. Male roundworms are bigger than female roundworms
B. Most worms do not replicate
C. Both of the above
D. None of the above
A

A. Male roundworms are bigger than female roundworms

Baliktad!

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7
Q

Enumerate two specific ways to transmit soil-transmitted helminths

A

Ingestion of embryonated eggs

Penetration of skin

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8
Q

Scientific name of giant intestinal roundworm

A

Ascaris lumbricoides

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9
Q

Which is false about Ascaris lumbricoides?
A. It is endemic in the Philippines
B.it is the most common intestinal nematode
C. Adult females are ventrally curves with two spicules
D. It has a stage of lung migration, which symptoms manifest after 9-12 days

A

C. Adult females are ventrally curves with two spicules

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10
Q

Infective stage of Ascaris lumbricoides?

A

Embryonated egg

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11
Q

Diagnostic stage of Ascaris lumbricoides?

A

Fertilized egg

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12
Q 
Which of the following drugs can treat infection caused by Ascaris lumbricoides?
A. Albendazole
B. Mebendazole
C. Pyrantel pamoate
D. All of the above
A

D. All of the above

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13
Q 
Trichuris trichura is also known as the 
A. Hookworm
B. Earthworm
C. Whipworm
D. All of the above
A

C. Whipworm

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14
Q

Adult whipworms may live at this specific part of the GI tract

A

Cecum (large intestine)

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15
Q

Infective stage of Trichuris trichura

A

Embryonated egg

16
Q

In Trichuris trichura, what is the spicule for?

A

Reproduction

17
Q 
Striking feature of Trichuris trichura egg
A. Thick wall
B. Golden brown
C. Bipolar plug
D. All of the above
A

C. Bipolar plug

18
Q 
Which can treat infections caused by Trichuris trichura?
A. Albendazole
B. Mebendazole
C. Both of the above
D. None of the above
A

C. None of the above

19
Q

Ascaris lumbricoides can live for how long?

A

1yr

20
Q

Trichuris trichura can live for how long?

A

5 years

21
Q

Enumerate three layers of nematode’s body cavity wall

A

Outer cuticle
Hypodermis
Musculature

22
Q

True or false. Male germ cells develop in spicules (for hookworms)

A

False. Testis pa rin.

23
Q

Components of nematodes’ nervous system: enumerate

A

Papillae
Amphids (anterior)
Phasmids (posterior)

24
Q

Can nematodes produce their own lipids?

A

No

25
Q

Which nematodes transmit infection via ingestion of embryonated eggs?

A

Ascaris lumbricoides

Trichuris trichuria

26
Q

Which nematodes transmit infection via penetration of skin?

A

Hookworm

Strongyloides stercoralis

27
Q

Sequence these steps of Ascaris life cycle
A)worm penetrates blood vessels
B)fertilized eggs in feces become embryonated
C)worm goes into lung migration
D)worm goes to trachea then esophagus
E)embryonated eggs are swallowed
F)worm at intestine as adult (if female, lays eggs)
G)embryonated eggs hatch

A

B E G A C D F B

28
Q

Pulmonary symptoms only manifest 9-12 days after egg ingestion, true or false?

A

True

29
Q

Fertilized Ascaris eggs have mammilations and refractive granules; they are also decorticate and with thick shell. True or false?

A

False. Unfertilized dapat. Fertilized ones have dividing cell mass

30
Q

Which is false?
A. Trichuris esophagus at anterior 3/5
B. GI, GU tract at posterior 2/5
C. Adults live in rectum

A

C. Adults live in rectum

Cecum and ascending colon dapat

31
Q

Sequence these steps of Ascaris life cycle
A) eggs become embryonated & infective
B)unembryonated eggs passed at stool
C) advance cleavage stage at soil
D) 2 cell stage
E)embryonated eggs are swallowed
F)adult egg lie in cecum/ascending colon, lay eggs
G)embryonated eggs hatches at small intestine

A

B C D A E G F B

32
Q

When does the Trichuris female begin to deposit eggs?

A

60-70 days after infection

33
Q

Purpose of Kato Thick smear

A

If positive/negative infection

34
Q

Kato-Katz purpose

A

Quantify burden of parasites

PH 172 (25 decks)

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