Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

ZoBot > Unit 4 Mollusk And Annelids > Flashcards

Unit 4 Mollusk And Annelids Flashcards

0
Q

What does pelecypoda mean

A

Hatchet shaped foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

What does Gastropoda mean

A

Stomach foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What does cephalopoda mean

A

Head foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the key evolutionary advances of mollusca

A

Systems and eucoelomate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What habitats do mollusk occupy?

A

Everywhere except deserts and arctic terrestrials

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the three keys of the general body plan of mollusk?

A

Bilateral, eucoelomate, protostome.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does protostome mean?

A

Mouth develops first, not anus.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are the three body regions of the mollusk

A

Head, foot, and visceral mass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does the head/foot contain?

A

Feeding, cephalic sensory, and locomotor organs. Needs muscular contractions to function.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does the visceral mass contain?

A

Digestive, circulatory, respiratory, and reproductive organs. Needs ciliary movement to function.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Radula

A

Rasping tongue with teeth on it that face backwards. Rips and tears tissues and constantly has to replace the teeth.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are the functions of the foot?

A

Movement, protection, pickup things, and reproduction (arm penis)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is blood hydraulics.

A

Mollusk fills/engorges foot with blood.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Mantle

A

Fleshy layer of tissue on dorsal body wall. Surrounds mantle cavity, houses gills and lungs.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What secretes the shell?

A

The mantle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the mantle divided into?

A

Incurrent and excurrent siphons.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Periostracum layer

A

Outer horny layer, forms ligament that attaches the two halves of shell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Prismatic layer

A

Middle layer of shell, thickest and bone like.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Nacreous layer

A

Inner layer, smooth and shiny, is secreted continuously.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Nacer

A

Used to form nacreous layer and pearls.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Mollusk nervous system

A

Has ganglia, connecting nerve cords, and neurosecratory cells.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Neurosecratory cells

A

Nerves that secrete hormones.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Trochophores

A

Free swimming, ciliated larva.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Are trochophores exclusively present in mollusk or Annelids?

A

Mixture of both. It suggest a common ancestor.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Veliger

A

Free swimming form of bivalves and gastropods. Is when the trochophore develops in the egg and hatches out.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Nutritional mode of gastropods

A

Herbivore, carnivore, detrivore

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Univalve

A

Have a single shell, is their chief form of defense.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Operculum

A

Leather plate of dorsal side of gastropods shell.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

What does the operculum do?

A

Hides body in the shell and helps prevent dessication.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

Torsion

A

The body has curled back on itself in the shells of gastropods.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

What problem does torsion create?

A

Causes the anus to be by the gills, which causes waste to flow into them.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

How was the problem with torsion solved?

A

Gastropods developed to only have gills on one side of the body so they can angle their bodies in the current and have the waste flow over the other side.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

Dextral

A

Right handed coiling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

Sinistral

A

Left handed coiling

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

How do you figure out which way the coiling is?

A

Point the coil away from you, face operculum up.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

What is coiling?

A

The evolution of the gastropod to be able to grow a balanced shell that is also protective.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

What sensory structures do gastropods have?

A

Eyes/photoreceptors at the end of their tentacles
Statocyst
Tactile organs
Chemoreceptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

Statocyst

A

Detect equilibrium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

Tactile organs

A

Sense touch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

Chemoreceptors

A

Sense smell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

What propels gastropods?

A

Muscular peristalsis of the foot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

What is nephridia

A

Kidney

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

Love darts

A

Snails stab each other in brain with the love darts on their head during sex. Whoever gets stabbed gets pregnant.

43
Q

What do love darts prohibit

A

The ability of the gastropod to kill sperm, because it injects enzymes into the brain.

44
Q

What is bivalve another name for

A

Pelecypoda

45
Q

Umbo

A

Notch between anterior and dorsal side of bivalve shell.

46
Q

What is the oldest part of the shell of a bivalve

A

The umbo

47
Q

How does a pearl form?

A

Sand gets stuck between the nacreous layer and the mantle. The bivalve covers the sane in nacre.

48
Q

Nutritional mode of pelecypoda

A

Filter Feeding

49
Q

Gill palps

A

Pull sand off bivalve gills

50
Q

Crystalline style

A

Stick in the stomach of bivalves that helps stir up the stomach

51
Q

Where do bivalves digest protein and fat

A

Intercellularly

52
Q

Where do bivalves digest carbs

A

Extracellularly in the stomach

53
Q

Sinus

A

Open cavity where blood bathes organ directly

54
Q

Pattern of blood flow in bivalves

A

Heart-artery-capillary or sinus-veins -kidney -gills -heart

55
Q

What kind of sense organs do bivalves have?

A

Statocyste in foot, tactile cells, pigment cells

56
Q

What do scallops have that are special

A

Blue eyes that see shadows

57
Q

Explain bivalve sex

A

Sperm is released in water and enters females incurrent siphon
Fertilization occurs and zygotes develop in the gills, become glochidia.
Glochidia go into water and parasitize fish.
Baby clams drop off fish.

58
Q

Glochidia

A

Step between clam zygote and baby clam. Parasites fish.

59
Q

What is the habitat of Cephalopods

A

Marine only, no fresh water

60
Q

What kind of head foot do cephalopods have

A

Tentacles with suckers

61
Q

What function do suckers serve

A

Used for suction and grasping prey.

62
Q

What do the suckers do during sex?

A

Become packets containing sperm.

63
Q

What do cephalopods have with their radula

A

Jaws

64
Q

What is a pen in a squid

A

The reduced shell in the squid visceral mass.

65
Q

What holds the cephalopod eye horizontally

A

Statocyst

66
Q

What kind of eyes to cephalopods have

A

Complex eyes much like humans

67
Q

What do radula and circular muscles do

A

Circulate water

68
Q

How do cephalopods swim

A

Expel water from the mantle cavity forcefully through ventral funnel.

69
Q

What functions as a cephalopod penis?

A

One of the arms of the cephalopod

70
Q

What is the common name of Annelids

A

Segmented worm

71
Q

What does Annelida mean

A

Little rings

72
Q

Key evolutionary advance of Annelids

A

Metamerism (segmentation)

73
Q

Why is metamerism important?

A

Complete control over each segment
Redundancy
Better nervous system

74
Q

Habitat of Annelids

A

Aquatic marine terrestrial

75
Q

What kind of development do Annelids have

A

Protostome

76
Q

What kind of coelem do Annelids have

A

Eucoelomate

77
Q

Polychaeta

A

Many bristles only marine

78
Q

Hirudinea

A

No bristles, freshwater, leeches

79
Q

Oligochaeta

A

Few bristles, terrestrial and fresh water, earthworms

80
Q

What do annelid movement depend on

A

Hydrostatic skeleton

81
Q

What does contraction of longitudinal muscles do

A

Makes body thicker and shorter

82
Q

What does contraction of circular muscles do

A

Makes body longer and thinner

83
Q

Setae

A

Anchor segments during burrowing of most earth worms. Each segment has four pairs.

84
Q

What are setae made of

A

Chitin

85
Q

How do earthworms move

A

Through peristalsis

86
Q

Nutritional mode of earthworms

A

Detrivore

87
Q

Prostomium

A

Upper lip of earthworm. Shovels dirt and wets it.

88
Q

Pharynx

A

Sucks in food

89
Q

Esophagus

A

Carries food from mouth to crop

90
Q

Crop

A

Stores dirt before digestion

91
Q

Gizzard

A

Grinds up dirt and breaks out nutrients before it goes to intestine.

92
Q

Typhlosole

A

Helps with the absorption in the intestines.

93
Q

Dorsal blood vessel

A

Functions as the true heart of the segmented worm.

94
Q

What direction does dorsal blood vessel pump.

A

Anteriorly

95
Q

Aortic arches

A

Bridges the dorsal vessel and ventral vessel

96
Q

What direction does blood move in ventral blood vessel

A

Posteriorly

97
Q

How do segmented worms respirate

A

Through their body wall

98
Q

Somite

A

Metamere

99
Q

Metanephridia/nephridia

A

Organ that filters waste and nutrients out.

100
Q

Two major sections of earthworm nervous system

A

Central nervous system

Peripheral nervous system

101
Q

What do earthworms have in place of eyes

A

Photoreceptors

102
Q

How are photoreceptors an adaptive advantage for earth worms

A

They can figure out if they’re above or under ground.

103
Q

Seminal receptacles

A

Holds the speed received from the mate.

104
Q

Chitinous band

A

Band that the fertilization occurs in, forms around earth worm and comes off to become cocoon

105
Q

Albumin

A

Protein put into chitinous band for babies to eat.

ZoBot (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions