Lab 4 - Additional info Flashcards

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1
Q

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

A

1 - Forked tail

2 - cuticular; spines; scale; dorsal

3 - cilia, ventral

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2
Q

The ascaris pharynx is __-radiate.

A

Tri

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3
Q

Adult Ascaris lives in the lumen of the ______ _______.

A

SI

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4
Q

What are optimum soil conditions for Ascaris eggs?

A

Moist, warm and shaded soil

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5
Q

Where do Ascaris larvae mature?

A

Lungs

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6
Q

How is trichinellosis acquired?

A

By ingesting meat containing cysts

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7
Q

Where do larvae of trichinella spirosis encyst?

A

Striated muscles

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8
Q

What is responsible for Trichinosis?

A

Trichenella spiralis

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9
Q

What muscle type does trichinellosis affect?

A

Skeletal

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10
Q

What type of meat could cause trichinosis?

A

Undercooked (pork)

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11
Q

The Dog heartworm is also called what?

A

Dirofilaria immitis

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12
Q

Dirofilaria immitis alternates between what two hosts?

Which is definitive, which is intermediate?

A

Mosquito - intermediate

Dog - definitive

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13
Q

Adult Wucheraria live where?

A

Lymph nodes

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14
Q

What are the embryos of Wucheraria called?

A

Microfilaria

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15
Q

How is Wucheraria carried to humans?

A

By mosquitos

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16
Q

What disease is associated with Wucheraria?

A

Elephantiasis

17
Q

What is the common name for wucheraria bancrofti?

A

Human filarial worm

18
Q

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

A

colon (night)

perianal region

19
Q

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

A
  • Inhalation of dust contaminated with eggs

- Direct ingestion

20
Q

Acanthocephalans are ________.

A

endoparasitic

21
Q

What characterizes Acanthocephalans?

A

A protrusible probosci covered by recurved spines

22
Q

What does the protrusible probosci provide for Acanthocephalans?

A

anchors them to mucosal lining of vertebrate host

23
Q

What does pseudocoelomate mean?

A

Lack a functional gut

24
Q

Juvenile nematomorphs parasitize ______, as adults they are ________

A

arthropods

free-living

25
Q

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

A

cuticle
single; hypodermis
muscle: longitudinally

26
Q

Class bdelloidea are exclusively _______.

A

Females

27
Q

Most Rotifers are ______ species.

A

freshwater

28
Q

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 _______

A

corona

mastax; trophi