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Biology Exam 4 > Ch 14 Echinodermata > Flashcards

Ch 14 Echinodermata Flashcards

1
Q

Echinodermata

Are they protostomes or deuterostomes?

A

Both

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2
Q

Echinodermata

Class Asteroidea?

A

Sea stars

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3
Q

Echinodermata

Class Ophiuroidea?

A

Brittle stars

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4
Q

Echinodermata

Class Echinoidea ?

A

Sea urchins and sand dollars

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5
Q

Echinodermata

Class Holothuroidea ?

A

Sea cucumbers

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6
Q

Echinodermata

Class Crinoidea ?

A

Sea lilies and feather stars

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7
Q

Echinodermata

Bilateral larvae

A
  • pentaradial adults Metamorphosis Unsegmented Triploblastic Complete digestive system Deuterostomes
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8
Q

Echinodermata

nervous system

A

no brain

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9
Q

Echinodermata

respiration

A

via papulae and tube feet

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10
Q

Echinodermata

circulatory system

A

reduced

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11
Q

How do they protect themselves?

A

can release toxins and the sea cucumber can discharge sticky, entangling threads in which predators can become trapped. Another defense mechanism of some sea cucumbers is the act of expelling all their internal organs via their anus to either satisfy or confuse their predator

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12
Q

What are papulae?

A

“the papillae of the tongue” sense organ, sensory receptor, receptor - an organ having nerve endings

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13
Q

What are pedicellaria?

A

a defensive organ like a minute pincer present in large numbers on an echinoderm.

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14
Q

What is the endoskeleton made up of?

A

Ossicles

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15
Q

What type of body symmetry do they have?

A

Bilateral larvae- pentaradial adults

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16
Q

What is the water vascular system and what do they use it for?

A

water-filled canal for Locomotion Attachment Feeding

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17
Q

What type of digestive system do they have?

A

Complete digestive system Deuterostomes

18
Q

Asteroidea:

Who are they?

A

Sea stars

19
Q

Asteroidea:

Where are they found?

A

Habitat: rock, sand, and mud of coastal waters, coral reefs, and deep seafloor

20
Q

Asteroidea:

What do they eat?

A

Predators- inverts: snails, corals, mollusks, crustaceans and worms

21
Q

Asteroidea:

How do they eat?

A

Out of body digestion

22
Q

Asteroidea:

What is the ambulacral groove? What is located there?

A

parts that include ossicles, plates, spines, and suckers Run length of each arm (under)Houses paired rows of tube feet

23
Q

Asteroidea:

How do they move?

A

slow movement by thousands of tube feet

24
Q

Asteroidea:

Can they move their arms easily?

A

No

25
Q

Ophiroidea:

How are they?

A

Brittle Stars (or Serpent Stars) and Basket Stars

26
Q

Ophiroidea:

Where do they live?

A

Hide in cracks and crevices until dark. Dark, remote sea bottoms to shallow water

27
Q

Ophiroidea:

How do they move differently from sea stars?

A

Arms are distinctly set off from central disk to allow lateral movement

28
Q

Echinoidea:

Who are they?

A

Sea Urchins, Heart Urchins, and Sand Dollars

29
Q

Echinoidea:

How are they different from each other (spines?)

A

Skeleton of 10 compact plates sutured with movable spines Sea Urchin: medium to long Sand dollar and heart urchins: very short

30
Q

Echinoidea:

Do they have distinct arms?

A

No

31
Q

Echinoidea:

How do they move?

A

Sea urchins- long moveable tube feet and moveable spines

Sand dollars- burrow and crawl using short moveable spines

32
Q

Echinoidea:

What do they eat?

A

Scrap algae off substrate Scavengers Eat kelp

33
Q

Holothuroidea:

Who are they?

A

Sea Cucumbers

34
Q

Holothuroidea:

Do they have arms?

A

No

35
Q

Holothuroidea:

Are their tube feet all over their body?

A

Two rows of tubed feet on ventral side

36
Q

Holothuroidea:

How do they move?

A

Crawling and burrowing is accomplished by tube feet or body wall muscles

37
Q

Holothuroidea:

What is auto evisceration?

A

heaving out your guts. Expel intestine. Some are toxic

38
Q

Crinoidea:

Who are they?

A

Sea Lilies and Feather Stars

39
Q

Crinoidea:

Describe the sea lily structure.

A

Stalk: stacked ossicles- appears jointed
Calyx: point where 5 arms attach to stalk
Pinnules: smaller branches off arms give feathery appearance
Crown: arms and calyx together
Feather stars similar to sea lilies

40
Q

Crinoidea:
Can sea lilies swim?
Can Feather stars?

A

lilies - no

feather stars - yes

41
Q

What type of sense organs to echinoderms have?

A

Touch
Light intensity
Temperature
Body orientation

Biology Exam 4 (4 decks)

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