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Zoo 201 > Mollusca > Flashcards

Mollusca Flashcards

1
Q

Which classes make up Mollusca?

A

Polyplacophacophora, Gastropoda, Bivalve and Cephalopoda

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2
Q

Another name for Polyplacophacophora is

A

the chitons

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3
Q

Another name for Gastropoda

A

snails and slugs

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4
Q

Another name for Bivalvia

A

bivalves

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5
Q

Another name for Cephalopoda

A

cephalopods

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6
Q

One characteristic lost by Mollusks as opposed to members of Annelida

A

segmented bodies

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7
Q

In relation to body cavities, Mollusks are

A

eucoelomates, but their coeloms are reduced

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8
Q

All classes of Mollusca display cephalization except,

A

the bivalves

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9
Q

Mollusks have a ____ digestive tract

A

complete with regional specialization

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10
Q

Mollusks are the first of our studies to have complex ______ _______

A

organ systems

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11
Q

What do Mollusks use for locomotion

A

muscular foot

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12
Q

Mollusks organs are contained within

A

a dorsal visceral mass that is covered by a mantle that also secretes a shell

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13
Q

A radula is

A

a grating mouthpiece

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14
Q

The class that lost radulas are

A

bivalves due to their filter feeding

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15
Q

The chitons are characterized by their

A

8 dorsal plates

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16
Q

Members of the bivalves include

A

clams, muscles, scallops and oysters

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17
Q

The oldest portion of bivalves’ shells, close to the hinge is called

A

the umbo

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18
Q

The most diverse class of Mollusks is

A

Gastropoda

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19
Q

The class Cephalopoda includes

A

octopuses, squids, cuttlefish and nautiluses

20
Q

The ventral foot found on Molluscs is modified into what in Cephalopoda members?

A

arms and tentacles

21
Q

A way to identify Cephalopoda tentacles from arms

A

tentacles are longer than their arms

22
Q

Cephalopoda are known as

A

the dos intelligent invertebrate

23
Q

Where is the radula located in Cephalopoda members

A

within the beak located on their buccal bulbs

24
Q

What allows some Cephalopoda to change color?

A

chromatophores which are pigmented cells

25
Q

What allows Cephalopoda to change direction quickly?

A

the jet propulsion mechanism- siphon expels water that enters mantle cavity

26
Q

The reduced shells in squids are

A

their pens

27
Q

The reduced shells in cuttlefish are

A

cuttlebone

28
Q

The reduced shells in octopuses are

A

completely lost

29
Q

What is the function of adductor muscles

A

keeping the clam closed

30
Q

What is the function of siphons in clams

A

filter feeding

31
Q

Why are stellate ganglia so large in cephalopods

A

they provide quick nerve impulsions to the predators so they can make sudden movements

32
Q

The two branchial hearts function to

A

supply oxygen to the gills

33
Q

Pictured is

A

Nudibranch

34
Q

Pictured is

A

banana slug

35
Q

Pictured are

A

sea hares

36
Q

Pictured is

A

helix

37
Q

Pictured are

A

tube snails

38
Q

Pictured are

A

limpets

39
Q

Pictured is

A

a snail radula

40
Q

Pictured are

A

clam glochidia

41
Q

Name the numbered structures.

A
  1. intestine
  2. gonad
  3. rectum
  4. suprabranchial chamber
  5. gills
  6. mantle
  7. foot
  8. kidney
  9. pericardium
  10. ventricle
  11. auricle
  12. shell
  13. hinge ligament
42
Q

Name the numbered structures.

A
  1. posterior adductor muscle
  2. posterior foot retractor muscle
  3. anterior adductor muscle
  4. labial palps
  5. mouth (opening)
  6. stomache
  7. intestine
  8. gonad (green)
  9. rectum
  10. excurrent aperture
  11. incurrent aperture
  12. suprabranchial chamber
  13. left gill
  14. mantle
  15. foot
  16. liver
  17. kidney
  18. pericardial cavity
43
Q

Name the numbered structures.

A
  1. posterior retractor muscle
  2. posterior adductor muscle
  3. excurrent siphon
  4. gills
  5. labial palps
  6. anterior adductor muscles
  7. foot
  8. mantle
44
Q

Name the numbered structures.

A
  1. hinge ligament
  2. hinge
  3. posterior adductor muscles
  4. gonad
  5. foot
  6. umbo
  7. intestine
  8. anterior adductor muscle
  9. digestive gland
  10. intestine
45
Q

Name the numbered structures.

A
  1. tentacles
  2. arms
  3. eye
  4. funnel
  5. collar
  6. mantle (body tube)
  7. fin
46
Q

Name the numbered structures.

A
  1. pen
  2. branchial heart
  3. ink sac
  4. stellate ganglion
47
Q

Name the numbered structures.

A
  1. gill
  2. esophagus
  3. radula
  4. beak
  5. pen
  6. buccal bulb

Zoo 201 (5 decks)

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