Mod 10 (tbc; table of parasites)

Question 1

Phylum Nematoda (level of complexity)

Answer 1

Organ-system grade

Question 2

Organs are organized enough to form organ-systems

Answer 2

Organ-system grade

Question 3

Excretory system has no protonephridia

Answer 3

Phylum Nematoda

Question 4

Phylum Nematoda (Shape)

Answer 4

Cylindrical shape

Question 5

Thick, noncellular outer covering made of collagen

Answer 5

Cuticle

Question 6

Underlying epidermis that secretes the cuticle

Answer 6

Hypodermis

Question 7

___ has a body cavity containing the organs, but does not have a structure called ____ which holds organs in place

Answer 7

Pseudocoelomate, peritoneum

Question 8

Gut is ____ of species that belong to the Phylum Nematoda

Answer 8

Complete

Question 9

Digestion is intracellular by phagocytosis of ____

Answer 9

Gastrodermal cells

Question 10

Phylum Nematoda (Nervous System)

Found around head and tail

Answer 10

Sensory papillae

Question 11

Phylum Nematoda (Nervous System)

Pair of complex sensory organs that open on each side of the head, which enters into a pore with dendrites

Answer 11

Amphids

Question 12

Phylum Nematoda (Nervous System)

Similar to amphids but found in posterior end

Answer 12

Phasmids

Question 13

Neddle-like mating structures found in posterior end of males to facilitate transfer of sperm

Answer 13

Copulatory spicules

Question 14

The most common and well studied free-living nematode

Answer 14

Caenorhabditis elegans

Question 15

Often large, parasitic nematodes; The worms can only mature and reproduce in the intestines of their specific host

Answer 15

Intestinal Roundworms

Question 16

The most common nematode parasite in humans

Answer 16

Ascaris lumbricoides

Question 17

Ascaris lumbricoides (Mode of Transmission)

Answer 17

Feco-oral

Question 18

Looks similar to A. lumbricoides, but it is spread by pigs (but can also infect humans)

Answer 18

Ascaris suum (large roundworm of pigs)

Question 19

Life-cycle similar to Ascaris, but juveniles do not migrate to other organs in the dog and just stay in the digestive tract

Answer 19

Toxocara canis (Intestinal Roundworm of Dogs)

Question 20

Intestinal roundworm of cats

Answer 20

Toxocara cati

Question 21

Small nematodes; their anterior end curves, giving it hook-like appearance; Worms only mature in the intestines of their host

Answer 21

Hookworms

Question 22

Heavy infections can lead to anemia and bloody diarrhea, and larvae penetrates the skin

Answer 22

Necator americanus (Human hookworm)

Question 23

Canine hookworm

Answer 23

Ancylostoma caninum

Question 24

Small nematodes that tends to curl into a spiral

Answer 24

Trichina Worms

Question 25

Tiny nematode. Mode of transmission is eating raw/undercooked pork with encysted juveniles

Answer 25

Trichinella spiralis (Trichina worm of pork)

Question 26

Small intestinal nematodes with a characteristic pointed tail, giving it a "pin-like" appearance

Answer 26

Pinworms

Question 27

Most common nematode parasite in children, but causes relatively little disease except for being an annoyance

Answer 27

Enterobious vermicularis

Question 28

Long, thin nematodes that invades the circulatory and lymphatic system of their host

Answer 28

Filarial Worms

Question 29

Humans are infected when bitten by mosquito carrying the infectious larval stage. The larva will travel through the circulatory system and the enter the lymphatic system to become adults.

Answer 29

Wuchereia bancrofti (Human filarial worm)

Question 30

Causative agent of Dirofilariasis/Heartworm in dogs

Answer 30

Dirofilaria immitis (Canine Heartworm)

Question 31

This shed throughout the growth of the worm

Answer 31

Cuticle

Question 32

This is present only in parasitic nematodes

Answer 32

Phasmids

Question 33

This type of nematode has mouth plates which allows them to bite through intestinal walls

Answer 33

Hookworms

Question 34

What do you call the larval form of filarial worms?

Answer 34

Microfilaria

Question 35

This structure is present in male nematodes and assists in the transfer of sperm

Answer 35

Spicules

Question 36

___ = thread

Answer 36

nematos