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invert zoo > lab exam #2 > Flashcards

lab exam #2 Flashcards

1
Q

mollusk body plan

A

coelomate

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2
Q

coelomate

A

a true body cavity lined with mesoderm and the organism is surrounded in tissue derived from the mesoderm

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3
Q

visceral mass

A

body cavity/location of organs within a mollusk

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4
Q

mantle

A

thin layer of tissue surrounding the visceral mass

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5
Q

mantle cavity

A

space between visceral mass and mantle

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6
Q

open circulatory system

A

blood does not stay within vessels; pumped out of heart through arteries but makes its way back through body cavity

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7
Q

hemolymph

A

hemocoel of mollusk is filled with blood so it is not just blood

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8
Q

classification of chiton

A

phylum Mollusca, class polyplacophora

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9
Q

what does class gastropod include

A

snails and slugs

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10
Q

classification of northern quahog

A

phylum mollusca, class bivalve, ex. mercenary mercenaria

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11
Q

name of squid from lab

A

long-finned squid
doryteuthis pealeii
class cephalopoda
phylum mollusca

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12
Q

classification of shorten squid

A

phylum mollusca, class Cephalopoda

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13
Q

characteristics of phylum arthropoda subphylum chelicerata

A

mouthparts = chelicerae (first appendage) (pincher parts for grabbing/eating), no antennae, 2nd appendage is pedipalps (grabbing/mating/sensory functions), and 2 tagmata

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14
Q

tagmata

A

regions of arthropod body - can be 2 or 3

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15
Q

tagmatization

A

fusion of tagmata

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16
Q

classification of horseshoe crab

A

phylum arthropoda, class merostomata, limulus polyphemus

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17
Q

classification of sea spider

A

phylum arthropoda class pycnogonida

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18
Q

examples of phylum arthropoda, class arachnida

A

spiders, ticks, scorpions, whip scorpions, and mites

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19
Q

characteristics of subphylum crustacea

A

jaw-like mandibles
biramous appendages
2 pairs of antennae
2 or 3 tagmata
mostly aquatic/marine

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20
Q

general characteristics of phylum arthropoda

A

coelomate protostomes
segmented bodies
jointed appendages
exoskeleton

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21
Q

characteristics of horseshoes crab

A

2 body regions
rounded carapace
posterior telson
book gills

22
Q

characteristics of sea spiders

A

chelicerae
pedipalps
4 pairs of legs
2 tagmata

23
Q

characteristics of arachnids

A

2 tagmata
chelicerae and palms
4 pairs of walking legs

24
Q

characteristics of class brachiopoda

A

feathery legs because of gills
ex. fairy shrimp/brine shrimp
*daphnia is an important example

25
Q

characteristics of class Copepoda

A

planktonic/benthic/ectoparasite
larva = nauplius

26
Q

characteristics of class cirripedia

A

ex. barnacles
stalked/sessile/parasitic
exoskeleton
6 pairs of modified legs
nauplius and capris larval stages

27
Q

classification of crab in lab

A

Jonah crab
cancer borealias
phylum arthropods
order decapods

28
Q

characteristics of subphylum hexapoda class insects

A

3 body regions
1 pair of antennae
2 compound eyes
3 ocelli for sensing light
2 pairs of wings

29
Q

classification of grasshopper in lab

A

eastern lubber grasshopper
romalea microptera
phylum arthropoda
order orthoptera

30
Q

entero- development of echinoderms

A

form a coelom that has mesodermal out pockets, creating a primitive gut in blastopore, and then the pockets separate and pinch out during gastrulation phase

31
Q

deuterostome development

A

anus forms first and mouth forms second

32
Q

characteristics of phylum echinodermata

A

bilateral larva
radial adults
typically pentamerous
not much cephalization
exclusively marine
endoskeleton
external fertilization

33
Q

4 classes of echinoderms we looked at

A

Asteroidea
Ophiuroidea
Echinoidea
Holothuroidea

34
Q

characteristics of class asteroidea

A

ex. starfish
pentamerous radial symmetry
central disk not easily demarcated
movement using tube feet
brightly colored
can eject cardiac stomach to catch and eat prey

35
Q

characteristics of class Holothuroidea

A

ex. sea cucumber
cylindrical
elongated along aboral/oral axis
tube feet in 5 rows along sides of body
no arms
can eviscerate internal organs as a defensive mechanism

36
Q

characteristics of class Ophiuroidea

A

ex. brittle stars
long arms
sharply demarcated central disk
5 arms
movement by wriggling arms

37
Q

characteristics of class Echinoidea

A

ex. sea urchins
rigid test covered by a ciliated epidermis (spines)
no arms
2 groups

38
Q

regular sea urchins

A

traditional sea urchins with perfect pentaradial symmetry, globular, and long defined spines

39
Q

irregular sea urchins

A

ex. sand dollar/sea biscuit
biracial symmetry
flattened
short/fuzzy/velvety spines covering the test

40
Q

name of sea star from lab

A

asterias sp.

41
Q

characteristics of phylum chordata

A

all vertebrates and related organisms
dorsal notochord
dorsal tubular nerve chord
tail posterior to anus
pharynx with paired gill slits

42
Q

characteristics of subphylum tunicata (Urochordata)

A

ex. seq squirt (ciona intestinalis), larvaceans, and salts
marine
soft bodied
u-shaped gut
body covered in tunic

43
Q

class ascidiacea

A

ex. sea squirts
bag shaped
2 siphones
solitary or colonial

44
Q

other name for branchiostoma

A

amphioxus

45
Q

how do bivalves eat

A

water current enters inhalant chamber via inhalant siphon, enters ostia, and leaves the exhaling chamber
food is filtered out of the current vis ostia and moved to food grooves then transported to mouth

46
Q

flow of open circulatory system

A

blood pumped out of heart through arteries, enters the hemocoel which surrounds the organs, blood returns to heart through ostia

47
Q

purpose of 2 branchial hearts in squid

A

considered accessory hearts
supply gills with unoxygentaed blood so that it can become oxygenated

48
Q

purpose of 1 systemic heart

A

supplies the rest of the body with oxygenated blood once received from branchial heart

49
Q

how do squids use jet propulsion

A

water enters mantle via inhalant siphon
circular muscles contract in mantle
forces water within mantle cavity out of the funnel

50
Q

extinct arthropod we discussed

A

trilobites
subphylum trilobitomorpha

51
Q

how many ostia does the crab heart from lab have

A

3 pairs
2 dorsal
1 lateral

52
Q

Malpighian tubes of grasshopper

A

found where mid and hindgut meet
excretory organs
empty waste through urine

invert zoo (3 decks)

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