Ls 1 Lecture May 19 Annelida

Front 1

annelids are (a/psuedo)coelomates

Back 1

coelomates

Front 2

annelids are protostomes/deuterostomes

Back 2

protostomes

Front 3

annelids are _______ symmetrical

Back 3

bilaterally

Front 4

hydrostatic skeleton

Back 4

The pressure of the fluid and action of the surrounding muscles are used to change an organism's shape and produce movement, such as burrowing or swimming

goes between tall,thin and wide,fat

Front 5

when tall, thin, which muscles contract and relax?

Back 5

circular muscle (around the body) contracts

longitudinal (along the body) relaxes

Front 6

when wide, flat, which muscles contract and relax?

Back 6

circular relaxes

longitudinal contracts

Front 7

true or false: annelids have no heart

Back 7

true

Front 8

true or false: annelids have an open circulatory system

Back 8

false, closed

Front 9

what is the main organ of an annelid's excretory system?

Back 9

nephridia

Front 10

metamerism

Back 10

segmentation

Front 11

annelids, arthropods and most chordates have segmentation, did this evolve dependently?

Back 11

no, they evolved independently 3 times

Front 12

advantages of segmentation

Back 12

body compartments independent
provides framework for regional specialization
evolution makes some segments do one thing, other segments do other things

Front 13

how does a coelom leead to more effective locomotor systems?

Back 13

serves as hydrostatic skeleton

Front 14

advantages of a coelom:

Back 14

gut independent of body wall
gain internal space for organs
gain internal fluid to distribute oxygen and nutrients throughout body
leads to more effective locomotor systems

Front 15

how does a coelom facilitate larger body size?

Back 15

gain internal fluid to distribute oxygen and nutrients throughout body

Front 16

what classes are in phylum annelida?

Back 16

class polychaeta
class oligochaeta (earthworms)
class hirudinea (leeches)
class pogonophora (hot vent worms, mostly deep sea)

Front 17

polychaeta means

Back 17

many setae

Front 18

what percentage of annelids are polychaeta

Back 18

70%

Front 19

what does it mean for annelids to have a tube within a tube?

Back 19

gut within coelom

Front 20

for locomotion and gas exchange, each segment of an polychaeta has

Back 20

paired parapodia (un-jointed lateral outgrowths)

Front 21

each segment of a polychaeta has ___ coelomic cavity

Back 21

one

Front 22

earthworms are in class

Back 22

oligochaeta

Front 23

true or false: oligochaeta are only terrestrial

Back 23

false; they're freshwater and terrestrial

Front 24

which end is pointed in the oligochaeta?

Back 24

both ends

Front 25

each segment has how many parapodia in an oligochaeta?

Back 25

none, oligochaetas don't have parapodia, only a few setae

Front 26

what does the clitellum do in the oligochaeta?

Back 26

secretes mucus for copulation and caccoon in which embryos develop

Front 27

how does respiration work for oligochaeta?

Back 27

diffusion, no specialized respiratory structures

Front 28

what kind of eaters are in class oligochaeta?

Back 28

scavengers (with highly differentiated gut [gizzard grinds, crop stores])

Front 29

oligochaeta reproduction

Back 29

cross-fertilizing hermaphrodites

Front 30

leeches are in which class?

Back 30

class hirudinea

Front 31

oligochaeta
have or not?
parapodia
setae
septa

Back 31

no parapodia
no setae
no septa

Front 32

class hirudinea species are ectoparasites mostly on ____

Back 32

vertebrates

Front 33

class hirudinea species use ______ to help blood flow well

Back 33

anti-coagulants

Front 34

class hirudinea species suck blood and digest with

Back 34

piptidases instead of proteases, because protein is broken down in blood

Front 35

largest class of annelids

Back 35

polychaeta

Front 36

deep sea annelids

Back 36

class pogonophora

Front 37

how has the burrower glycera modified the parapodia for locomotion?

Back 37

uses eversible proboscis to "punch and anchor" in sediment; long setae provide traction

Front 38

how has the tube-dweller diopatra modified the parapodia for locomotion?

Back 38

parapodial projection

Front 39

how has the planktonic rhynchonerella modified the parapodia for locomotion?

Back 39

paddle-like-swimming parapodium

Front 40

reproductively, leeches are

Back 40

hermaphrodites

Front 41

which classes have clitella

Back 41

oligochaete and hirudinea

Front 42

which classes have sensory structures?

Back 42

polychaete

Front 43

which classes have setae

Back 43

polychaete and oligochaete

Front 44

which classes have parapodia

Back 44

polychaete