Lab Exam 1

Question 1

where is the anus located in snails

Answer 1

near the head/anteriorly

Question 2

pneumostome =

Answer 2

respiratory pore for letting in air

Question 3

what covers most of the first whorl in snails

Answer 3

the ‘lung’

Question 4

what are all but the first body whorl in a snail occupied by?

Answer 4

the digestive gland and reproductive system

Question 5

where is received sperm in a snail saved until the eggs are ready for fert?

Answer 5

a spermatheca

Question 6

hermaphroditic duct in snails function

Answer 6

transportation of eggs and sperm

Question 7

common duct in snails function

Answer 7

conduct sperm to meet the eggs

Question 8

what does the albumen gland add

Answer 8

albumen

Question 9

what is albumen

Answer 9

fluid to coat the fertilized egg

Question 10

dart sac funct

Answer 10

prod hormone-laced calcerous spicules that are injected into a partner during courtship, leading to mating

Question 11

what structure surrounds the esophagus of a snail

Answer 11

a nerve ring

Question 12

path of sperm in snails (5)

Answer 12

1. prod in the ovotestes
2. packaged into spermatophores in the flagellum
3. transferred to partner via penis
4. stored in the spermatica until eggs are ready
5. fert the eggs in the fert chamber after passing through the oviduct and common duct

Question 13

path of eggs in snails (4)

Answer 13

1. prod in the ovotestes
2. matured eggs pass thru the hermaphroditic duct into the fert chamber
3. albumen glands add albumen to fertilized eggs
4. eggs move down the common duct, and acquire a calcareous shell
5. eggs are laid through the common genital opening

Question 14

what lies in the pallial groove between the mantle and the foot in chitons?

Answer 14

ctenidia

Question 15

chiton girdle function

Answer 15

forms the margin of the body; is what valves are embedded in

Question 16

tiny holes on the posterior edge of a chiton?

Answer 16

where neurons that run to tiny light sensory structures on the surface of the shell (ocelli) would have been

Question 17

what mineral is the radula in chitons hardened by?

Answer 17

magnetite

Question 18

nephridium funct

Answer 18

works with the digestive system, perhaps like a kidney?

Question 19

acontia funct in sea anemones

Answer 19

bear nematocysts - defense

Question 20

rhopalia in Cnidarians function

Answer 20

structures that combine both light and balance receptors

Question 21

do Scuphozoans have a velum?

Answer 21

no

Question 22

colloblasts

Answer 22

coiled spiral filament that is embedded in the epidermis and an axial filament with a granular dome
- on tentilla of a ctenophore

Question 23

manubrium cnidaria

Answer 23

tube that connects the stomach on one end to the four-parted mouth on the other

Question 24

radial canal funct cnidaria

Answer 24

takes water out to the arms from the ring canal

Question 25

velum funct cnidaria

Answer 25

concentrates water being expelled from under the medusa’s oral surface, acting as a jet-propulsion system

Question 26

cormidium

Answer 26

1 set of a colony of Siphonophora

Question 27

rhabdites

Answer 27

ventral structures in Planaria

Question 28

parenchyma tissue

Answer 28

fills the body of flat worms

Question 29

asconid structural type sponges (3)

Answer 29

• stalk-like spongocoel surrounded by a single layer of choanocytes
• small
• one osculum

Question 30

syconoid structural type sponges (4)

Answer 30

• tubular body
• a single osculum
• body wall is thicker and more complex
• contains choanocyte-lined radial canals that empty into the spongocoel

Question 31

leuconoid structural type sponges (3)

Answer 31

• canal system forms a more elaborate branched network, and the canals lead to digestive chambers instead of a spongocoel
• choanocytes line the digestive chambers and not the canals
• multiple oscula

Question 32

micropyle in sponges

Answer 32

a hatch for the central cells to escape through in a gemmule