Echinoderms- Asteroidea

Question 0

Where is the mouth located in sea stars?

Answer 0

Central disk of the oral or ventral side

Question 1

Class Asteroidea contains

Answer 1

Sea stars

Question 2

Aboral surface

Answer 2

The top or dorsal surface if an organism

Question 3

Ambulacral groove

Answer 3

Grooves located on the oral surface and they hold tubes feet

Question 4

Tubed feet are also called

Answer 4

Podia

Question 5

Podia are guarded by what

Answer 5

Movable spines around the margins of the grooves

Question 6

Tubed feet are used

Answer 6

For locomotion

Question 7

Light sensitive eyespots which are small tentacles that contain pigments sensitive to light are locate where

Answer 7

At the tip of each arm

Question 8

Sub-dermal spines and specialized pinchers are called

Answer 8

Pedicellariae

Question 9

What is the function of Prdicellariae?

Answer 9

Capture small animals and carry them to the mouth

Question 10

The outer layer of sea stars are covered by the

Answer 10

Epidermis

Question 11

The epidermis is covered by

Answer 11

A cuticle

Question 12

The epidermis has what

Answer 12

Neurosensory cells connected to mucus glands

Question 13

What happens when detritus falls on the body

Answer 13

It is coated with mucus and the ciliates cells sweep the particles away

Question 14

In sea stars how are ossicles joined together

Answer 14

By muscle fibers and connective tissues making it very flexible

Question 15

Sea stars feed on

Answer 15

Snails, bivalves, crustaceans, polychates, coral and are all carnivorous

Question 16

Sea stars digest how?

Answer 16

They every their stomachs out their mouths and externally digest

Question 17

Sea stars have how many stomachs

Answer 17

2

Question 18

The lower stomach is the

Answer 18

Cardiac stomach

Question 19

The upper stomach is the

Answer 19

Pyloric stomach

Question 20

Extra cellular digestion occurs where

Answer 20

Digestive ceca

Question 21

Water enters the hydrovascular system where

Answer 21

The sieve plate (madreporite)

Question 22

From the sieve plate water travels to the stone canal and from the stone canal water travels to the

Answer 22

Ring canal and out the arms through the radial canals

Question 23

Ballon like structure on the internal side

Answer 23

Ampulla

Question 24

Podia is

Answer 24

A hollow muscular tube and some species contain a sucker

Question 25

Gas exchange occurs through

Answer 25

Diffusion through gills, through tubed feet, by water circulation

Question 26

Excretion occurs through

Answer 26

Water flow or through membranes of the tubed feet

Question 27

Their nervous system consists of

Answer 27

A nerve ring which contains branches of nerve that run down each arm

Question 28

For regeneration how much of the nerve ring must be present

Answer 28

1/5

Question 29

Sea stars are able to regenerate completely in about

Answer 29

A year

Question 30

There is usually how many breeding seasons a year

Answer 30

1

Question 31

One female can release how many eggs at once

Answer 31

2.5 million