Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Parasitology lec > Generalities of nematodes > Flashcards

Generalities of nematodes Flashcards

1
Q

Nematodes belong to what phylum?

A

Phylum Aschelminthes/Phylum
Nemathelminthes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In fresh specimens, nematodes are
recovered as __________ in color.

A

light cream or white

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Meaning, a cross section of a roundworm could be divided into two equal parts.

A

Bilaterally Symmetrical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

there are no lines or segments present, unlike earthworms who have segments. (one distinctive way to differentiate)

A

Non-segmented, Cylindrical in shape

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Vital organs of nematodes are enclosed in a _____________

A

pseudocoel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

is the body cavity of the
nematodes.

A

pseudocoel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

is body/protective covering of parasites.

A

cuticle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Cuticle is composed of _________
substance

A

chitin/chitin-like

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Nematodes have a complete digestive system:

A
  • Mouth
  • Buccal cavity
  • Esophagus
  • Pharynx
  • Intestine
  • Rectum
  • Anus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Some nematodes, depending
on the species, can be equipped with other structures such as _______ and _______ in the buccal cavity

A

teeth or cutting plates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Part of the dgestive system of a nematodes that is It is muscular and bulb-like.

A

Esophagus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Has tri-radiate symmetry

A

Pharynx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Part of nematode for release and excretion of waste

A

Anus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

In terms Reproductive Structures, Nematodes are ______, meaning, they have separate sexes.

A

Dioecious

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Are tubular and coiled

A

Nematodes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Male or Female Nematode

Smaller in size

A

Male

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Male or Female Nematode

Curved Posterior

A

Male

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Male or Female Nematode

Testes, vas deferens, seminal vesicle, ejaculatory duct ; gubernaculum

A

Male

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Male Nematode

lined with prostate or cement glands

A

Ejaculatory duct

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Male Nematode

accessory copulatory apparatus

A

gubernaculum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Male Nematode

Used as a copulatory structure

A

Spicules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Male Nematode

Used to allow the sperm to gain entry into
the vagina of the female worm

A

Spicules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Male Nematode

Numbers may vary; some have 1, some
have 2

A

Spicules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Male Nematode

Bell-like structure

A

Copulatory bursa

25
Q

Male Nematode

Can be seen in some nematodes such as
hookworms

A

Copulatory bursa

26
Q

Male Nematode

assist in
securing the female during copulation;

A

Dorsal rays

27
Q

Male Nematode

Dorsal rays are also present

A

Copulatory bursa

28
Q

Male or Female Nematode

Bigger in size

A

Female

29
Q

Male or Female Nematode

Pointed posterior

A

Female

30
Q

Male or Female Nematode

Uterus

A

Female

31
Q

Male or Female Nematode

Vagina, ovaries, oviduct are also present

A

Female

32
Q

Female Nematodes

This contains eggs

A

Uterus

33
Q

What do nematodes don’t have?

A

Circulatory system
(No blood vessels)

34
Q

Nematodes are ________: free-living or parasitic

A

facultative

35
Q

Reproduction

Produces
Immature/Unembryonated Egg

A

Oviparous

36
Q

Produce or lay
mature/embryonated eggs

A

Ovoviviparous

37
Q

Produces larvae
instead of Eggs

A

Larviparous

38
Q

Example of Oviparous

A
  • Ascaris lumbricoides
  • Trichuris trichiura
  • Enterobius vermicularis
  • Hookworms
39
Q

Example of Larviparous

A

Trichinella spiralis

40
Q

Presence of _______ which act as the nervous system for the parasite

A

Chemoreceptors

41
Q

Where can you find the chemoreceptors of nematodes?

A
  • anterior/cephalic portion
  • posterior/caudal portion
42
Q

Chemoreceptors present in the cephalic are called

A

amphids

43
Q

Chemoreceptors present in the caudal are called

A

phasmids

44
Q

Phasmid worm (which has the phasmid)
belongs to what class?

A

Class Phasmidia/Secernetia

45
Q

Aphasmid Worm (which does not have the caudal receptors) belongs to what class?

A

Class
Aphasmidia/Adenophorea

46
Q

Stages of Nematodes:

A
  • Adult stage
  • Larva (L1 - L4)
  • Egg/Ovum
  • Microfilaria
47
Q

The larval stage undergoes four moltings, from _____

A

L1 → L4

48
Q

In the laboratory, ___ and ____ are the important
stages

A

L1&L3

48
Q

possess uniform muscular
esophagus

A

L3: Filariform Larva

49
Q

Non-feeding stage

A

L3: Filariform Larva

50
Q

May serve as the infective stage

A

L3: Filariform Larva

51
Q

possess expanded and
bulb-like posterior esophagus

A

L1: Rhabditiform Larva

52
Q

Feeding stage (open-mouth stage)

A

L1: Rhabditiform Larva

53
Q

Egg can be _______ or ______ once release depending on the species

A

embryonated or unembryonated

54
Q

are encountered in filarial worms

A

Microfilaria

54
Q

It is described as pre-rhabditoid stage

A

Microfilaria

55
Q

stage prior
the larval stage

A

rhabditoid stage

56
Q

considered as a modified type of egg

A

Microfilaria

57
Q

Inside
is an elongated embryo developing.

A

Microfilaria

Parasitology lec (24 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions