nematodes

Question 1

estimated number of species of nematodes

Answer 1

500,000

Question 2

general morphology of nematodes

Answer 2

nonsegmented
cylindrical
bilaterally symmetrical
tapered at both ends
covered by cuticle
complete digestive tract
no circulatory system
sexes are separate
majority are free living

Question 3

tough protective covering made up of chitin

Answer 3

cuticle

Question 4

t/f
females are smaller than males

Answer 4

f (males are smaller)

Question 5

nematodes can be divided into two classes based on the presence of __

Answer 5

chemoreceptors

Question 6

two classes of nematodes

Answer 6

class phasmidia
class aphasmidia

Question 7

possesses caudal chemoreceptors

Answer 7

class phasmidia

Question 8

lacks caudal chemoreceptors

Answer 8

class aphasmidia

Question 9

anterior or cephalic sensory organs

Answer 9

amphids

Question 10

esophagus is uniform throughout

Answer 10

filariform

Question 11

esophagus expansion posteriorly into a bulb with a valve mechanism

Answer 11

rhabditiform

Question 12

t/f
nematodes have longitudinally oriented muscles important for locomotion

Answer 12

t

Question 13

three types of musculature of nematods

Answer 13

polymyarian
meromyarian
holomyarian

Question 14

type of nematode with more than five rows of cells

Answer 14

polymyarian

Question 15

type of nematode with two to five rows

Answer 15

meromyarian

Question 16

type of nematode with less than two rows

Answer 16

holomyarian

Question 17

female nematodes have __ , __ , __ , __

Answer 17

two cylindrical ovaries, uterine, vulva, vagina

Question 18

male nematodes posess __ or __

Answer 18

a pair of copulatory spicules, thin-walled copulatory bursa

Question 19

t/f
eggs does not vary

Answer 19

f (eggs vary in size and shape)

Question 20

__ larva is the stage that hatches from the egg

Answer 20

rhabditiform

Question 21

third stage larva

Answer 21

filariform

Question 22

infective form of parasites

Answer 22

filariform larvae

Question 23

nematodes MOT

Answer 23

ingestion
larva
skin penetration
inhalation
transmammary
vectors

Question 24

nematodes transmitted through ingestion

Answer 24

a. lumbricoides
t. trichiura
e. vermicularis

Question 25

nematodes transmitted through larva

Answer 25

c. philippinensis
a. cantonensis
t. spiralis

Question 26

nematodes transmitted through skin penetration

Answer 26

s. stercoealis
hookworms

Question 27

nematodes transmitted through inhalation

Answer 27

e. vermicularis

Question 28

nematodes transmitted through transmammary

Answer 28

s. stercoralis
a. duodenale

Question 29

nematodes transmitted through vectors

Answer 29

filarial worms