Download Chapter 16

Chapter 16
1.
A)
B)
C)
D)
E)
The name Echinodermata translates as
spiny skin.
spiny skeleton.
spiny gut.
smooth skin.
smooth skeleton.
2.
A)
B)
C)
D)
E)
Modern adult echinoderms have a form of symmetry known as
asymmetry.
pentaradial.
triradial.
bilateral.
trilateral.
3. Embryologically, the echinoderm water vascular system originates as modification of
the
A) pyloric cecae.
B) dermal branchiae.
C) coelom.
D) Tiedemann's bodies.
E) closed circulatory system.
4.
A)
B)
C)
D)
E)
The __________ serves as an inlet into the water vascular system.
Tiedemann's body
Polian vesicle
radial canal
madreporite
ring canal
5.
A)
B)
C)
D)
E)
In the sea stars, a(n) __________ groove runs along the underside of each arm.
madreporite
Polian vesicular
stone canal
tube feet
ambulacral
6. In sea stars, contraction of the __________ force water into the tube feet of the water
vascular system.
A) ampullae
B) lateral canals
C) Polian vesicles
D) hemal rings
E) Tiedemann's bodies
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7.
A)
B)
C)
D)
E)
Regeneration of lost parts of a sea star also serves in
feeding.
sexual reproduction.
asexual reproduction.
discouraging predators.
removing toxins from the body.
8.
A)
B)
C)
D)
E)
Members of the echinoderm class __________ are called sea stars.
Crinoidea
Echinoidea
Asteroidea
Holothuroidea
Ophiuroidea
9.
A)
B)
C)
D)
E)
Sea stars typically feed
on suspended materials.
on kelp.
on detritus in the sediments.
on bivalves.
on small crustaceans on the ocean floor.
10.
A)
B)
C)
D)
E)
In sea stars, thin folds of the body wall that function in respiration are called
filamentous gills.
ctenidia.
Polian vesicles.
book gills.
dermal branchiae.
11. In sea stars, the __________ surface is the top of the animal and contains the
madreporite.
A) aboral
B) oral
C) madreporite
D) anal
E) rigid
12. The __________ are found on the oral surface of the arms of the sea star, and house the
tube feet.
A) pedicellariae
B) ambulacral grooves
C) Polian vesicles
D) lateral canals
E) Tiedemann's bodies
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13. The outermost region of the sea star stomach, the __________, can be everted from the
body.
A) gizzard
B) crop
C) cardiac stomach
D) pylorus
E) rectal cecum
14.
A)
B)
C)
D)
E)
The major secretory and absorptive structures of the sea star digestive system are the
cardiac stomachs.
rectal ceca.
Polian vesicles.
pyloric ceca.
Tiedemann's bodies.
15.
A)
B)
C)
D)
E)
The principal nitrogenous waste of sea stars is
urea.
uric acid.
urine.
guanine.
ammonia.
16. Sea stars possess strands of tissue that encircle the mouth and run into the arms; these
strands of tissue make up the __________ system.
A) hemal
B) secretory
C) skeletal
D) muscular
E) excretory
17.
A)
B)
C)
D)
E)
__________ function in cleaning the body surface of many echinoderms.
Ambulacrae
Dermal branchiae
The madreporites
Pedicellariae
Cuverian tubules
18.
A)
B)
C)
D)
E)
Sea daisies have a thin membrane, the __________, that digests and absorbs nutrients.
tongue
pyloric cecum
Aristotle's lantern
cardiac stomach
velum
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19.
A)
B)
C)
D)
E)
Basket stars and brittle stars belong to the echinoderm class
Asteroidea.
Echinoidea.
Crinoidea.
Holothuroidea.
Ophiuroidea.
20.
A)
B)
C)
D)
E)
Unlike sea stars, in ophiuroids, the tube feet are extended by
contraction of muscles at their bases.
ampullae forcing water into the feet.
hydrostatic pressure.
contraction of their suction disks.
contraction of lateral canals.
21.
A)
B)
C)
D)
E)
Of the following structures found in sea stars, which one is also present in brittle stars?
pedicellariae
tube feet
dermal branchiae
aboral madreporite
ampullae
22. If a brittle star is grasped by an arm, certain muscles may contract to serve and cast off
the arm in a process called
A) asexual reproduction.
B) rejection.
C) autotomy.
D) regeneration.
E) escapism.
23.
A)
B)
C)
D)
E)
The characteristic larval stage of brittle stars is the
dipleurula.
brachiolaria.
bipinnaria.
ophiopluteus.
echinopluteus.
24.
A)
B)
C)
D)
E)
Sea urchins and sand dollars belong to the echinoderm class
Crinoidea.
Asteroidea.
Ophiuroidea.
Holothuroidea.
Echinoidea.
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25.
A)
B)
C)
D)
E)
The skeleton of sea urchins consists of ten closely fitting plates and is called a(n)
test.
exoskeleton.
cuticle.
tunic.
spine.
26.
A)
B)
C)
D)
E)
The function of Aristotle's lantern is
protection.
digestion.
chewing.
locomotion.
regeneration.
27.
A)
B)
C)
D)
E)
The primary circulatory medium in echinoids is
blood.
hemal fluid.
plasma.
coelomic fluid.
pyloric cecae.
28.
A)
B)
C)
D)
E)
The characteristic larva of the echinoids is the
dipleura.
brachiolaria.
auricularia.
bipinnaria.
echinopluteus.
29.
A)
B)
C)
D)
E)
Sea cucumbers belong to the echinoderm class
Holothuroidea.
Crinoidea.
Asteroidea.
Ophiuroidea.
Concentricycloidea.
30.
A)
B)
C)
D)
E)
The madreporite in sea cucumbers is
absent.
internal.
external.
on the Polian vesicles.
near the anus.
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31.
A)
B)
C)
D)
E)
Sea cucumbers respire using
large feathery oral tentacles.
oral gills.
the respiratory tree.
the body wall.
Cuverian tubules.
32. Some sea cucumbers have special tubules of the respiratory tree that contains sticky
secretions and toxins and can be everted through the anus; these are called __________
tubules.
A) Tiedemann's
B) Polian
C) holothurion
D) Cuverian
E) malpighian
33.
A)
B)
C)
D)
E)
Sea lilies and feather stars belong to the echinoderm class
Holothuroidea.
Asteroidea.
Ophiuroidea.
Concentricycloidea.
Crinoidea.
34.
A)
B)
C)
D)
E)
The most primitive of all living echinoderms are the
crinoids.
ophiuroids.
holothuroids.
asteroids.
echinoids.
35.
A)
B)
C)
D)
E)
Attached crinoids are called
sea daisies.
sea lilies.
sea urchins.
basket stars.
feather stars.
36.
A)
B)
C)
D)
E)
The sea daisy belongs to the echinoderm class
Asteroidea.
Ophiuroidea.
Holothuroidea
Crinoidea.
Echinoidea.
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