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Bio11 > Ch26 > Flashcards

Ch26 Flashcards

1
Q

Groups of nerve cells that serve a very primitive brain

A

Ganglia

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2
Q

Specialized cells that remove excess water from the body of a planarian

A

Flame cells

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3
Q

Segments that make up the body of the tape worm

A

Proglottids

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4
Q

The head of a tapeworm containing hooks and suckers

A

Scolex

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5
Q

Term meaning that no body cavity is present. The germ layers are packed closely together.

A

Acoelomate

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6
Q

The organism upon which a parasite lives

A

Host

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7
Q

Terms meaning that certain body systems are lost or reduced in size

A

Degeneration

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8
Q

The concentration of the brain and sense organs in the anterior end of the body.

A

Cephalization

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9
Q

Term meaning that an organism has both male and female reproductive structures

A

Hermaphrodite

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10
Q

The type of asexual reproduction in which the organism splits in two

A

Fragmentation

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11
Q

A false coelom that is only partly lined with mesoderm tissue

A

Pseudocoelom

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12
Q

Name given to the type of digestive system that has s mouth at one end and an anus at the other end

A

Tube within a tube

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13
Q

An organism that lives in or on the body of another organism

A

Parasite

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14
Q

The external layer found in flukes and tapeworms that protects the worm from the immune system of the host

A

Tegument

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15
Q

A light sensitive group of cells that can detect changes in light in the environment

A

Eyespots

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16
Q

The phylum Nematoda is made up of flatworms

T/F

A

F

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17
Q

The flatworms are acoelomates

T/F

A

T

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18
Q

Roundworms are the simplest animals with bilateral symmetry

T/F

A

F

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19
Q

All worms develop from embryos that have three germ layers

T/F

A

T

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20
Q

Flatworms have a digestive system with two openings

T/F

A

F

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21
Q

The digestive system is often the most advanced system in s parasitic worm
(T/F)

A

F

22
Q

The phylum that contains more organisms than any other animal phylum is Cnidaria
(T/F)

A

F

23
Q

A snail is the intermediate host in a tapeworm

T/F

A

F

24
Q

A gastrovascular cavity is a digestive chamber with only one opening
(T/F)

A

T

25
Q

Planarian are flatworms that are not parasites

T/F

A

T

26
Q

Almost any vertebrate can be host to a tapeworm

T/F

A

T

27
Q

New proglottids are formed at the posterior end of a tapeworm
(T/F)

A

F

28
Q

Flatworms have a tube within a tube digestive system

T/F

A

F

29
Q

Roundworms have long and slender bodies that are tapered at both ends
(T/F)

A

T

30
Q

Tapeworms may enter a new host by burrowing through the bottoms of the feet of the host
(T/F)

A

F

31
Q

The function of the pharynx in the planarian is

A

Feeding

32
Q

What are three flatworms

A

Planarian, fluke, tapeworm

33
Q

A human may become infected with tapeworms by

A

Eating uncooked meat

34
Q

What are four roundworms

A

Hookworms, ascaris, filarial worms, pinworms

35
Q

A scolex is used to

A

Attach to the intestinal wall of the host

36
Q

Four examples of parasitic worms

A

Tapeworms, filarial worms, pinworms, ascaris

37
Q

Flame cells are involved with what function

A

Excretion

38
Q

How many openings does the roundworm digestive tract have

A

Two

39
Q

What is the phylum of the flatworms

A

Platyhelminthes

40
Q

What is the phylum of the roundworms

A

Nematoda

41
Q

Are roundworms acoelomates, pseudocelomates, or coelomates

A

Pseudocelomates

42
Q

Are flatworms acoelomates, pseudocelomates, or coelomates

A

Acoelomates

43
Q

The ability to grow back lost or missing parts

A

Regeneration

44
Q

Name given to a host from which adult parasites obtain their nutrition

A

Primary host

45
Q

Name given to a host from which larvae obtain their nutrition

A

Intermediate host

46
Q

What body system is often missing in intestinal worms

A

Digestive

47
Q

What worm might enter the body by burrowing through the soles of the feet

A

Hookworm

48
Q

What are two adaptations found in parasitic worms

A

Hooks

Segments that break off

49
Q

What type of symmetry is found in both flatworms and roundworms

A

Bilateral

50
Q

Human disease often caused by eating undercooked pork that contains cysts

A

Trichinosis

51
Q

The worm that causes elephantiasis in humans and heart worm disease in dogs

A

Filarial

52
Q

A disease characterized by the swelling and decay of body tissues when eggs clog the blood vesicles

A

Schistosomiasis

Bio11 (1 decks)

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