para lab nematodes

Question 1

Often called round worms

Answer 1

PHYLUM NEMATODA

Question 2

This means that the body
can be divided along a line that separates the body into right and left halves. They are almost identical to each other.

Answer 2

Bilaterally symmetrical helminths.

Question 3

This means that they have complete digestive tract, unlike flatworms in which food and waste enter and exit in the same opening.

Answer 3

Elongated cylindrical bodies

Question 4

These animals that has complete digestive system; have mouth at one end, along tube with specialized parts in the middle like esophageal bulbs, and the anus on the other end.

Answer 4

Complete digestive tract.

Question 5

The one characteristic special with your nematode would be some are present with

Answer 5

sensory chemoreceptors

Question 6

are the major sensory system of the nematodes, these are your special nerve cells that detect changes in the chemical composition of the blood, then, it will send information to your brain to regulate your cardiovascular and respiratory functions.

Answer 6

Chemo receptors

Question 7

Sexes are typically

Answer 7

separated

Question 8

The males are ___ than the females with a _____

Answer 8

smaller, curved posterior end.

Question 9

more than one host (filarial worms like the c. philippinensis in which it has one intermediate and one definitive host.)

Answer 9

heteroxenous

Question 10

only one host (almost all nematodes)

Answer 10

homoxenous

Question 11

Ingestion of Fully Embryonated Ova

Answer 11

® Trichuris Trichiura
® Ascaris Lumbricoides
® Enterobius Vermicularis

Question 12

Ingestion of Fully Embryonated Encysted Larva

Answer 12

® Trichinella Spiralis
® Capillaria Philippinensis

Question 13

Larval Skin Penetration (thigmotropism)

Answer 13

® Hookworms (Ancylostoma | Necator)

Question 14

Bites of Arthropod | Skin Inoculation

Answer 14

® Wuchereria Bancrofti
® Brugia Malayi

Question 15

These are producing eggs that develop and
hatch outside the maternal body.

Answer 15

oviparous

Question 16

Directly gives birth to larva
® No egg stage; filariform or rhabditiform
® Being born alive
® Trichinella spp. | Dracuncular spp.

Answer 16

viviparous, larviparous

Question 17

Producing eggs that develop within the maternal body and hatch within.
Can be egg form or larval form
Lay eggs that immediately hatch out Strongyloides spp.

Answer 17

ovoviviparous

Question 18

all parasites commonly reside on the

Answer 18

gastrointestinal tract

Question 19

Small intestine

Answer 19

® Capillaria Philippinensis
® Ascaris Lumbricoides
® Strongyloides Stercoralis

Question 20

Large intestine

Answer 20

Trichuris Trichiura
Enterobius Vermicularis

Question 21

Phasmids (with chemoreceptor)

Answer 21

® A. Lumbricoides
® S. Stercoralis
® Hookworms (Ancylostoma | Necator)

Question 22

Aphasmids (without caudal receptor)

Answer 22

® T. Trichiura
® E. Vermicularis
® C. Philippinensis
® T. Spiralis

Question 23

are the nematodes that are commonly transmitted through soil transmission.

Answer 23

Soil Transmitted Helminths

Question 24

Soil Transmitted Helminths

Answer 24

o A. Lumbricoides
o T. Trichiura
o Hookworms (Ancylostoma | Necator)

Question 25

Also known as the giant roundworm

Answer 25

ASCARIS LUMBRICOIDES

Question 26

Most common intestinal nematode

Answer 26

ASCARIS LUMBRICOIDES

Question 27

Frequent in tropics like moist and warm climate.

Answer 27

ASCARIS LUMBRICOIDES

Question 28

Estimated infected individuals more than one billion (70% from Asia since Asia has a moist and warm climate)

Answer 28

ASCARIS LUMBRICOIDES

Question 29

Females are larger than males in an adult worm. Male has a curved longer in temperate region. posterior end.

Answer 29

ASCARIS LUMBRICOIDES

Question 30

® Tissue reaction to the invading larvae ® Irritation of the intestine by mechanical and toxic action of the adult. ® Other complications due to heavy infection and extra intestinal migration.

Answer 30

ASCARIS LUMBRICOIDES

Question 31

ascaris lumbeicoides produces

Answer 31

Pepsin inhibitor 3 Phosphorylcholine

Question 32

Protects worm from digestion specifically the acids in your gastrointestinal tract.

Answer 32

PEPSIN INHIBITOR 3 (PI-3).

Question 33

Suppresses lymphocyte proliferation. Since lymphocyte tries to fight of certain invaders in your body.

Answer 33

PHOSPHORYLCHOLINE

Question 34

Male and Female adult worm size (A. lumbricoides)

Answer 34

Male Length: 12-31 cm long Width: 2-4 cm wide Female: Length: 22-35 cm long Width: 3-6 cm wide

Question 35

Posterior end: ventrally curved w 2 spicules

Answer 35

Male Adult Larva of A. lumbricoides

Question 36

where eggs to develop into infective stage.

Answer 36

Embryonation

Question 37

Embryonation where eggs to develop into infective stage. It takes

Answer 37

2-3 weeks

Question 38

survive in moist shaded soil for a few months to 2 years in tropical and subtropical areas but longer in temperte region

Answer 38

embryonated eggs

Question 40

single long, tortuous tubule spicules: 2; broad

Answer 40

reproductive organ of male a. lumbricoides

Question 41

reproductive organ: paired in the posterior 2/3 Vulva: opens at the middle

Answer 41

reproductive organ of female a. lumbricoides

Answer 42

reproductive organ of female a. lumbricoides