Parasitology Exam 3 and answers
BilateralThe symmetry of most nematoda is
PseudocoelomNematodas possess a ________
(coelom/pseudocoelom/acoelom)
CompleteNematodas have a(n) _________ digestive tract (complete/incomplete)
Underlying hypodermisIn nematoda, the noncellular cuticle ...
Parasitology Exam 3 and answers
Bilateral✔✔The symmetry of most nematoda is
Pseudocoelom✔✔Nematodas possess a ________
(coelom/pseudocoelom/acoelom)
Complete✔✔Nematodas have a(n) _________ digestive tract (complete/incomplete)
Underlying hypodermis✔✔In nematoda, the noncellular cuticle is secreted by an
_________ ________.
4✔✔In nematoda, a chitinous cuticle is shed __ times.
Ventral excretory pore✔✔In nematoda, where does the secretory-excretory system
open?
Cuticle, hypodermis and body wall musculature✔✔The body wall of nematodes
consists of _______, _______ and _______ .
Hypodermis✔✔In nematodes, the cuticle is secreted by the
Syncitial✔✔In nematodes, the hypodermis is_______.
Longitudinally, 4✔✔In nematoda, epidermal cords run __________ and divide the
body into __ quadrants.
Dorsal and ventral cords✔✔In nematoda, what contains longitudinal nerve trunks?
Excretory✔✔In nematoda, lateral cords contain lateral canals of the _________
system.
Circular layers✔✔In nematoda, muscles of the body wall are longitudinal with no
_________ __________.
Myocyton✔✔What is the name given to the noncontractile cell body in nematoda?
Myosin and actin✔✔In nematoda, muscle contractions occur similar to vertebrate
striated muscle with _________ and _________.
Somatic musculature, cuticle, pseudocoelom and fluid.✔✔In nematoda, what are the
4 components that function as the hydrostatic skeleton?
Peritoneal lining✔✔In nematodes, a pseudocoelom differs from a true coelom in that
it has no _________ _________ .
Fluid filled cavity✔✔A pseudocoelom is a
, Hemolymph✔✔Pseudocoelomic fluid is also known as _________ .
Hydrostatic skeleton✔✔A pseudocoelom in nematoda also functions as a:
Contraction and relaxation in dorsal and ventral muscles✔✔What produces the
characteristic S-shape motion seen in nematode locomotion?
Esophageal region and anal region✔✔In nematoda, where are the two main
concentrations of nerve elements?
Cephalic and claudal region✔✔In nematoda, where are sensilla most prominent?
Buccal muscles and anterior esophageal muscles✔✔In nematoda, which muscles
contract to open the mouth and suck in the food?
Hydrostatic pressure✔✔In nematoda, what kind of pressure closes the mouth?
Via muscle contractions✔✔In nematoda, how does food pass down the esophagus?
Hydrostatic pressure✔✔In nematoda, what kind of pressure "pushes food down"?
Depressor ani✔✔In nematoda, what muscle contracts to open the anus?
Hydrostatic pressure✔✔In nematoda, when the anus is opened, what causes
defecation?
Intestine✔✔In nematoda, excretion occurs through the ________.
No✔✔Does nematoda contain flame cells or nephridia?
Habitat✔✔In nematoda, osmoregulation depends on ________.
Dioecious, larger, curled✔✔In nematoda, reproduction is _________, females are
__________ than males, and the tail of males is _________.
Oviparous✔✔Mos nematodes are _________ . (how they give birth, ex
ovovoviparous)
Rachis✔✔In nematoda, germ cells move via ________.
Paired, one✔✔In nematoda, there are generally ___ testes, but some species only
have __.
Pseudopodium✔✔Nematode spermatozoa use _______.
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