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Bio 2 Lab Practical > Phylum Platyhelminthes and Nematoda > Flashcards

Phylum Platyhelminthes and Nematoda Flashcards

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Biology 101 flashcards
1
Q

What type of worm is Phylum Platyhelminthes?

A

Free-living flatworm (tapeworms, liver flukes)

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2
Q

What kind of opening do flatworms have?

A

Gastrovascular cavity with one opening that is both mouth and anus

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3
Q

Which Phylum are acoelomates?

A

Platyhelminthes (flatworms)

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4
Q

_____ have no body cavity. Their mesoderm is a solid mass of tissue with no internal cavity.

A

Acoelomate

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5
Q

Which Phylum are pseudocoelomates?

A

Nematodes

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6
Q

_____ have a body cavity consisting of a fluid filled space between the body wall and digestive tract. (developed between mesoderm and endoderm)

A

Pseudocoelomates

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7
Q

______ have a body cavity bounded by mesoderm.

A

Coelomates

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8
Q

Which Phylums are Coelomates?

A

Annelids and Mollusca

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9
Q

What type of worms are Phylum Nematoda?

A

Roundworms (pinworms, hookworms)

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10
Q

What are the 3 classes of Phylum Platyhelminthes?

A

Turbellaria, Trematoda, & Cestoda

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11
Q

What type of receptors are eyespots?

A

Photoreceptors

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12
Q

Individuals have both male and female sexual organs

A

Hermaphroditic

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13
Q

The head of flatworms has lateral lobes and sensory organs called ______

A

Eyespots

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14
Q

Dugesia, a common freshwater turbellarian, feeds by sucking food through its mouth and into a tubular ____ leading to the ______.

A

pharynx

gastrovascular cavity

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15
Q

The muscular ____ is usually retracted in the body but can be everted through an opening in the midventral epidermis.

A

pharynx

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16
Q

middle of the lower surface of Flatworms.

A

Epidermis

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17
Q

Most digestion in the gastrovascular cavity is _____

A

extracellular, but phagocytic cells line the cavity and complete digestion of small particles intracellularly.

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18
Q

What body plan of Dugesia (planaria) allows it to regenerate and regrow its head and the right side of its body?

A

The mesodermal tissue which is the loose mass of cells between the ectoderm on the surface and the endoderm lining the gastrovascular cavity and pharynx

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19
Q

Which classes of Platyhelminthes are parasites?

A

Trematoda and Cestoda

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20
Q

Trematodes lack an _____ and are covered by an acellular but metabolically active epicuticle.

A

epidermis

21
Q

What is the epicuticle made of?

A

Proteins and lipids secreted by mesodermal cells.

22
Q

The epicuticle helps in respiration and ____.

A

absorbing nutrients

23
Q

The ventral surface of a fluke usually has two adhesive organs called _____

A

suckers

24
Q

Are Class Turbellaria monoecious or dioecious?

A

Monoecious (hermaphroditic)

25
Q

Is Genus Opthisthorchis monoecious or dioecious?

A

Monoecious (hermaphroditic)

26
Q

This oriental liver fluke attaches to the bile duct and releases eggs that move through the digestive system of the host and exits with the feces.

A

Opisthorchis

27
Q

Humans are infected by this fluke when they eat raw or poorly cooked fish.

A

Opisthorchis

28
Q

Which flukes are endoparasites?

A

Opisthorchis, Schistosoma and Fasciola

29
Q

Humans acquire this parasite by eating water chestnuts and other aquatic plants with larvae attached.

A

Fasciola

30
Q

This blood fluke inhabits the intestinal veins and other organs of many vertebrates, causing the disease schistosomiasis.

A

Schistosoma

31
Q

An _____ host is an organism harboring immature stages of a parasite.

A

intermediate

32
Q

A _____ host contains sexual mature, egg-laying stages of the life cycle.

A

definitive

33
Q

Snails are intermediate hosts of which fluke?

A

Schistosoma

34
Q

Unlike most trematodes, _____ is dioecious.

A

Schistosoma

35
Q

Which class of Trematodes are Tapeworms?

A

Cestoda

36
Q

_____ lack a mouth or digestive tract. Their cuticles efficiently absorbs nutrients from their host.

A

Tapeworms

37
Q

The anterior end of a tapeworm, bearing suckers and hooks for attachment. Adhere’s to host’s intestinal wall.

A

Scolex

38
Q

Series of segments in tapeworms. Chain may be 10-15 m long.

A

Proglottids

39
Q

_____ eventually break from the end of the worm and pass out of the host with its feces.

A

Gravid (egg-carrying) proglottids

40
Q

Humans infect themselves from ____ by eating POORLY cooked pork.

A

Trichinella

41
Q

Humans infect themselves from _____ by eating UNCOOKED meat from pigs.

A

Taenia

42
Q

Elephantiasis is commonly caused from the nematode ____.

A

Filaria

43
Q

Parasitic nematode that appears in the eye of its host

A

Loa Loa

44
Q

_____ lack flagella and cilia and are covered with a flexible and chemically complex cuticle.

A

Nematodes

45
Q

The ____ resists digestive enzymes and is permeable only to water, dissolved gases, and some ions. Permits locomotion and growth.

A

cuticle

46
Q

Roundworms have a body cavity called a ______ consisting of a fluid-filled space between the body wall and digestive tract..

A

pseudocoelem

47
Q

Nematodes have a ______ exoskeleton that aids in locomotion.

A

hydrostatic

48
Q

____ are the most common parasite in the United States.

A

Pinworms

Bio 2 Lab Practical (5 decks)

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