Midterms_Laboratory_Starfish

Question 1

this is an entire egg that has a rather large prematuration nucleus

Answer 1

unfertilized egg

Question 2

The nucleus of the unfertilized egg is called?

Answer 2

germinal vesicle

Question 3

Where is the germinal vesicle located?

Answer 3

Germinal Spot

Question 4

Function of vitelline membrane?

Answer 4

protection for the yolk

Question 5

Fertilization membrane function?

Answer 5

prevent polyspermy

Question 6

the space between the egg and envelope membrane is known as the?

Answer 6

perivitelline space

Question 7

the starfish egg exemplifies what type of cleavage?

Answer 7

Holoblastic

Question 8

The resulting cells after cell division are called?

Answer 8

blastomeres

Question 9

A solid multicellular mass formed as a result of cell proliferation.

Answer 9

Morula

Question 10

This is the intermediary stage between early cleavage and the final blastula.

Answer 10

morula

Question 11

The starfish develop a hollow sphere called the?

Answer 11

coeloblastula

Question 12

The starfish develops a hollow sphere (coeloblastula) containing a fluid in its central cavity known as the?

Answer 12

blastocoel

Question 13

A layer of peripheral cells, not of uniform thickness, surrounding this cavity is the?

Answer 13

blastoderm

Question 14

What pole gives rise to the ectoderm and ectodermal derivatives?

Answer 14

animal pole

Question 15

T or F
The coeloblastula loses its spherical shape and becomes flattened at the animal pole. This flattened part represents the future region of the embryo.

Answer 15

False: animal, vegetal

Question 16

The center of the flattened part of the coeloblastula invaginated to form a new cavity called?

Answer 16

gastrocoel

Question 17

What do you call the opening of the archenteron?

Answer 17

gastropore

Question 18

Gastropore gives rise to the?

Answer 18

anus

Question 19

At what embryonic stage does the 3 germ layers form?

Answer 19

Gastrulation stage

Question 20

Locate the mesenchyme cells.

Answer 20

between the ectoderm and gut

Question 21

free-swimming, bilaterally symmetrical larvae of the starfish.

Answer 21

Bipinnaria

Question 22

The function of nutritive phagocyte?

Question 23

The vitellogenic oocyte is surrounded by a mitotic layer called?

Answer 23

germinal epithelium

Question 24

This is the sac that holds the eggs in place.

Answer 24

gonadal sac

Question 25

What do you call the cells DEEP to the nutritive phagocytes in the starfish male gonad?

Answer 25

sperm

Question 26

What do you call the meiotic cells within the nutritive layer of the starfish testis?

Answer 26

spermatogonia

Question 27

What do you call the cell of the unfertilized egg as a whole?

Answer 27

ovum/ oocyte/ egg cell

Question 28

protective layer of the unfertilized egg

Answer 28

vitelline membrane

Question 29

What do you call the cell in the fertilized egg of the starfish?

Answer 29

zygote

Question 30

What do you call the entire ball of cells?

Answer 30

morula

Question 31

Cavity formed in the blastula

Answer 31

blastocoel

Question 32

What is the cavity formed in gastrulation?

Answer 32

Archenteron

Question 33

What germ layer do mesenchyme cell reside in gastrula?

Answer 33

mesoderm

Question 34

What is the opening at the posterior region of the bipinnaria?

Answer 34

anus

Question 35

Give two digestive organs of the bipinnaria

Answer 35

esophagus and stomach

Question 36

What is the cavity formed in the bipinnaria

Answer 36

coelom

Question 37

WHat is the opening at the central part of the bipinnaria?

Answer 37

mouth