Echinoderm Test Flashcards

(59 cards)

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

25
Feeding styles of Echinoderms
Filtering and suspension, predation, vegetarian
26
Skeleton of Echinoderms composed of
Calcium carbonate
27
Water enters hydro vascular system through what structure?
Madreporite
28
Balloon like structures that control extension of tube feet of Echinoderms
Ampulla
29
Body symmetry of adult Echinoderms
Pentamerous radial
30
What type of symmetry do Echinoderms have during their larval stage?
Bilateral
31
What body systems do Echinoderms not have?
Circulatory, respiratory, excretory
32
Do Echinoderms have a nervous system?
Yes, but they have no head or brain
33
What is the oral surface of Echinoderms?
Mouth located on this side
34
What is aboral surface of Echinoderms?
Top of body
35
Trace the movement of water through the water vascular system
Water enters through the madreporite, passes through stone canal to ring canal, enters radial canal, and connects to tube feet and ampulla
36
Which Echinoderms are filter feeders?
Brittle stars, crinoids
37
Which Echinoderms are grazers?
Sea urchin
38
Which Echinoderms are detritavores?
Sea stars
39
Which Echinoderms are predators?
Sea stars
40
Which Echinoderms are suspension feeders?
Sea cucumber
41
In Echinoderms where are eggs and sperm produced?
In the arms
42
What are free swimming larva
Bipannaria
43
What are the classes of Echinoderms?
- Holothuroidea - Crinoidea - Echinoidea - Ophiuroidea - Asteroidea
44
What organisms are in the class Holothuroidea?
Sea cucumbers/ sea pig
45
What organisms are in Crinoidea?
Sea lilies
46
What organisms are in Echinoidea?
Sea urchins, sand dollars, sea biscuits
47
What organisms are in Ophiuroidea?
Brittle stars
48
What organisms are in Asteroidea?
Sea stars
49
What is a sea cucumbers defense?
Ejects guys through the cloaca | Cloaca: opening used for reproduction and excretion
50
How do sea cucumbers feed?
Sift through sand
51
What type of feeders are sea lilies?
Filter feeders
52
Characteristics of sea lilies?
Long feather like arms and short hook like legs called cirri | -upward facing mouths
53
What do sea urchins feed on?
Algae
54
What eats sea urchins?
Otters
55
What is the test of the sea urchin?
Exoskeleton that houses internal organs
56
How do brittle/basket stars feed?
Suspension/filter feeders | -produce mucus to catch food
57
What do sea stars eat?
Oyster, clams, mussels
58
How many stomachs do sea stars have?
2
59
What are the 2 stomachs?
Cardiac and pyloric | -cardiac: everted out of organism to digest prey