Embryology

Question 1

Triploblastic

Answer 1

Endoderm, ectoderm and mesoderm

Question 2

__ becomes the brain if the animal has one

Answer 2

Ectoderm

Question 3

Mesoderm comes from areas around ___ in protostomes

Answer 3

blastopore

Question 4

Cells of a gastrula migrate in and form a pocket of cells called

Answer 4

Archenteron

Question 5

Blastomeres are unequal in size and completely divided

Answer 5

Holoblastic (high yolk)

Question 6

Cells on the outside of the blastocyst?

Answer 6

Trophoblasts

Question 7

zygote -> early cleavage -> late cleavage -> blastocyst -> embryonic plate -> primitive streak -> neural groove -> neural tube -> organ differentiation

Answer 7

Mammal path

Question 8

A solid ball of cells

Answer 8

Morula

Question 9

blastodisk = ___ path

Answer 9

Bird / Reptile path

Question 10

zygote -> early cleavage -> late cleavage -> blastodisk -> primitive streak -> neural groove -> neural tube -> organ differentiation

Answer 10

Bird / Reptile path

Question 11

64 cells -> 128 cells (Too many to count)

Answer 11

late cleavage

Question 12

What does blastopore become for protostomes?

Answer 12

mouth

Question 13

What does the endoderm become?

Answer 13

Inner lining of the digestive tract and the respiratory tract

Question 14

What are the 5 embryology pathways

Answer 14

Non-chordates Primitive chordate Amphibian Bird/Reptile Mammal

Question 15

Resting phase for amphibian path?

Answer 15

yolk plug stage

Question 16

“Everything else”

Ex. Becomes muscle, cartilage, bone, blood…etc

Answer 16

Mesoderm

Question 17

-> late cleavage -> blastula -> gastrula -> yolk plug -> neural groove -> neural tube -> organ differentiation

Answer 17

Amphibian path

Question 18

Cells of the archenteron as defined as

Answer 18

Endoderm

Question 19

Difference between blastula and gastrula?

Answer 19

Formation of blastopore.

Question 20

What does blastopore become for deuterostomes?

Answer 20

anus

Question 21

Mesoderm comes from out pockets of ___ in deuterostomes

Answer 21

archenteron

Question 22

__ becomes the dorsal nerve if the animal has one

Answer 22

Ectoderm

Question 23

Zygote -> early cleavage -> late cleavage -> blastula / blastocoel -> gastrula -> organ differentiation (larva)

Answer 23

Non-chordate path

Question 24

Blastomeres are equal in size and completely divided

Answer 24

Holoblastic (low yolk)

Question 25

-> gastrula -> neural groove -> neural tube -> organ differentiation

Answer 25

Primitive chordate path

Question 26

__ becomes the outer covering of the animal

Answer 26

Ectoderm

Question 27

What does the inner cell mass become?

Answer 27

The embryo

Question 28

What do Trophoblasts become ?

Answer 28

The embryo’s portion of the placenta

Question 29

Diploblastic

Answer 29

Endoderm and ectoderm

Question 30

Blastomeres are not completely divided

Answer 30

Meroblastic (huge yolk)

Question 31

Cells of a gastrula migrate in and form a hole called

Answer 31

Blastopore

Question 32

How many embryology pathways are there?

Answer 32

5

Question 33

Embryonic cells / early embryonic cells

Answer 33

blastomere

Question 34

A hollow ball of cells

Answer 34

Blastocoel