Lab 4 - Additional info

Question 1

There are three distinguishing features of Gastrotrichs:
1 - Presence of a ______ ______
2 - Modified ______ surface with ______ or _____-like covering on the ______ side
3 - Distribution of _____ is visually restricted to the ______ side

Answer 1

1 - Forked tail

2 - cuticular; spines; scale; dorsal

3 - cilia, ventral

Question 2

The ascaris pharynx is __-radiate.

Answer 2

Tri

Question 3

Adult Ascaris lives in the lumen of the ______ _______.

Answer 3

SI

Question 4

What are optimum soil conditions for Ascaris eggs?

Answer 4

Moist, warm and shaded soil

Question 5

Where do Ascaris larvae mature?

Answer 5

Lungs

Question 6

How is trichinellosis acquired?

Answer 6

By ingesting meat containing cysts

Question 7

Where do larvae of trichinella spirosis encyst?

Answer 7

Striated muscles

Question 8

What is responsible for Trichinosis?

Answer 8

Trichenella spiralis

Question 9

What muscle type does trichinellosis affect?

Answer 9

Skeletal

Question 10

What type of meat could cause trichinosis?

Answer 10

Undercooked (pork)

Question 11

The Dog heartworm is also called what?

Answer 11

Dirofilaria immitis

Question 12

Dirofilaria immitis alternates between what two hosts?

Which is definitive, which is intermediate?

Answer 12

Mosquito - intermediate

Dog - definitive

Question 13

Adult Wucheraria live where?

Answer 13

Lymph nodes

Question 14

What are the embryos of Wucheraria called?

Answer 14

Microfilaria

Question 15

How is Wucheraria carried to humans?

Answer 15

By mosquitos

Question 16

What disease is associated with Wucheraria?

Answer 16

Elephantiasis

Question 17

What is the common name for wucheraria bancrofti?

Answer 17

Human filarial worm

Question 18

Fertilized female pinworms, migrate from the ____ (usually at ____) and lay thousands of eggs in the _______ region.

Answer 18

colon (night)

perianal region

Question 19

How can embryonated eggs of the human pinworm enter the digestive tract?

Answer 19

• Inhalation of dust contaminated with eggs

- Direct ingestion

Question 20

Acanthocephalans are ________.

Answer 20

endoparasitic

Question 21

What characterizes Acanthocephalans?

Answer 21

A protrusible probosci covered by recurved spines

Question 22

What does the protrusible probosci provide for Acanthocephalans?

Answer 22

anchors them to mucosal lining of vertebrate host

Question 23

What does pseudocoelomate mean?

Answer 23

Lack a functional gut

Question 24

Juvenile nematomorphs parasitize ______, as adults they are ________

Answer 24

arthropods

free-living

Question 25

The body wall of nematomorphs consists of:
1 - A thick _______
2 - ______-layered, cellular _______
3 - ______ layers whose fibers run _______, as in nematodes

Answer 25

cuticle
single; hypodermis
muscle: longitudinally

Question 26

Class bdelloidea are exclusively _______.

Answer 26

Females

Question 27

Most Rotifers are ______ species.

Answer 27

freshwater

Question 28

Rotifers have two distinguishing features:
1 - A ciliated, apical region called the ______, used in locomotion and for gathering food

2 - A muscular pharynx (______) equipped with completed jaws of seven pieces called _______

Answer 28

corona

mastax; trophi