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Marine Science > Echinoderm Test > Flashcards

Echinoderm Test Flashcards

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1
Q

Where are the light sensitive eyespots of a sea star located?

A

Small tentacles at the tip of each arm

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2
Q

What joins the ossicles together on echinoderms?

A

CT and muscle fibers

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3
Q

Gas exchange in a sea star takes place through which of the following two structures?

A

Tube feet, skin gills

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4
Q

For what purposes do brittle stars use their arms?

A

Take food into their mouths, to crawl rapidly along the bottom

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5
Q

How do brittle stars free themselves from predators?

A

Autonomy

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6
Q

Organisms in the class Echinoidea contain these structures, which are sometimes poisonous for protection?

A

Spines

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7
Q

5 toothed mouth called aristotles lantern is located in which organism?

A

Sea urchin

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8
Q

What are the tentacles surrounding the mouth of a sea cucumber used for?

A

Feeding

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9
Q

The test is the internal skeleton for which organism?

A

Sea urchin

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10
Q

Which of these are the most highly mobile echinoderms?

A

Brittle or serpent stars

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11
Q

Which echinoderm rolls up into a ball to travel in the ocean surge, and then opens up to feed?

A

Basket stars

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12
Q

Sea cucumbers have the ability to spit out a portion of their intestines to distract predators, what’s this called?

A

Evisceration

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13
Q

Podia is another name for

A

Tube feet

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14
Q

Circulation of water through a sea star accomplishes what 3 things?

A

Movement, excretion of waste, gas exchange

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15
Q

Asteroids feed on which of the following?

A

Bivalves

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16
Q

Sea stars use what for movement?

A

Tube feet

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17
Q

Sea stars use this system to circulate water through their bodies

A

Hydro vascular

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18
Q

With what do sea stars pry open the shells of scallops, clams, mussels?

A

Tube feet

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19
Q

Calcareous plates fused to form the skeleton of most Echinoderms are called?

A

Ossicles

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20
Q

Where are tube feet housed?

A

Ambulacral grooves

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21
Q

Small pitcher like structures of Echinoderms, used for collecting food, protection, and sometime camouflage

A

Pedicellariae

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22
Q

Stone canal, ring canal, radial canal, all part of what body system of Echinoderms?

A

Hydro vascular

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23
Q

Echinoderms have what type of skeleton

A

Internal

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24
Q

Underside of sea star where the mouth is

A

Oral surface

25
Q

Feeding styles of Echinoderms

A

Filtering and suspension, predation, vegetarian

26
Q

Skeleton of Echinoderms composed of

A

Calcium carbonate

27
Q

Water enters hydro vascular system through what structure?

A

Madreporite

28
Q

Balloon like structures that control extension of tube feet of Echinoderms

A

Ampulla

29
Q

Body symmetry of adult Echinoderms

A

Pentamerous radial

30
Q

What type of symmetry do Echinoderms have during their larval stage?

A

Bilateral

31
Q

What body systems do Echinoderms not have?

A

Circulatory, respiratory, excretory

32
Q

Do Echinoderms have a nervous system?

A

Yes, but they have no head or brain

33
Q

What is the oral surface of Echinoderms?

A

Mouth located on this side

34
Q

What is aboral surface of Echinoderms?

A

Top of body

35
Q

Trace the movement of water through the water vascular system

A

Water enters through the madreporite, passes through stone canal to ring canal, enters radial canal, and connects to tube feet and ampulla

36
Q

Which Echinoderms are filter feeders?

A

Brittle stars, crinoids

37
Q

Which Echinoderms are grazers?

A

Sea urchin

38
Q

Which Echinoderms are detritavores?

A

Sea stars

39
Q

Which Echinoderms are predators?

A

Sea stars

40
Q

Which Echinoderms are suspension feeders?

A

Sea cucumber

41
Q

In Echinoderms where are eggs and sperm produced?

A

In the arms

42
Q

What are free swimming larva

A

Bipannaria

43
Q

What are the classes of Echinoderms?

A
  • Holothuroidea
  • Crinoidea
  • Echinoidea
  • Ophiuroidea
  • Asteroidea
44
Q

What organisms are in the class Holothuroidea?

A

Sea cucumbers/ sea pig

45
Q

What organisms are in Crinoidea?

A

Sea lilies

46
Q

What organisms are in Echinoidea?

A

Sea urchins, sand dollars, sea biscuits

47
Q

What organisms are in Ophiuroidea?

A

Brittle stars

48
Q

What organisms are in Asteroidea?

A

Sea stars

49
Q

What is a sea cucumbers defense?

A

Ejects guys through the cloaca

Cloaca: opening used for reproduction and excretion

50
Q

How do sea cucumbers feed?

A

Sift through sand

51
Q

What type of feeders are sea lilies?

A

Filter feeders

52
Q

Characteristics of sea lilies?

A

Long feather like arms and short hook like legs called cirri

-upward facing mouths

53
Q

What do sea urchins feed on?

A

Algae

54
Q

What eats sea urchins?

A

Otters

55
Q

What is the test of the sea urchin?

A

Exoskeleton that houses internal organs

56
Q

How do brittle/basket stars feed?

A

Suspension/filter feeders

-produce mucus to catch food

57
Q

What do sea stars eat?

A

Oyster, clams, mussels

58
Q

How many stomachs do sea stars have?

A

2

59
Q

What are the 2 stomachs?

A

Cardiac and pyloric

-cardiac: everted out of organism to digest prey

Marine Science (12 decks)

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