Exam 2 Practice Questions

Question 1

Left and right bronchial buds will give rise to ________

Answer 1

Lungs

Question 2

The sclerotome of somites on the right and left fuse to form a ___________?

Answer 2

Centrum

Question 3

The primitive heart tubes expands into 5 dilated regions, which of them becomes the future right ventricle?

Answer 3

Bulbus cordis

Question 4

On day 22 an outgrowth from the foregut produces the ___________?

Answer 4

Respiratory diverticulum

Question 5

What forms within the septum primum of the embryonic heart?

Answer 5

Foramen ovale

Question 6

The respiratory diverticula becomes surrounded by ____________ to form the bulk of the future lung?

Answer 6

splanchnic mesoderm

Question 7

Which of the following structures will form the dorsal mesenteries of abdomen?
A) paraxial mesoderm
B) splanchnic mesoderm
C) endoderm
D) ectoderm
E) somatic mesoderm

Answer 7

B) splanchnic mesoderm

Question 8

Development of the respiratory system is closely linked to development of the _____________ system?

Answer 8

Digestive

Question 9

Endocardial tubes form within which structure?

Answer 9

cardiogenic mesoderm

Question 10

The respiratory system develops from which germ layer?

Answer 10

Endoderm

Question 11

Limb buds develop from a group of cells within the ________?

Answer 11

Somatic mesoderm

Question 12

What is the gut derivative for the ascending colon?

Answer 12

Midgut

Question 13

What is the gut derivative for the liver?

Answer 13

Foregut

Question 14

What is the gut derivative for the duodenum?

Answer 14

Midgut

Question 15

What is the gut derivative for the stomach?

Answer 15

Foregut

Question 16

What is the gut derivative for the rectum?

Answer 16

Hindgut

Question 17

An important signal to maintain pregnancy and the corpus luteum is released from which structure?

Answer 17

Syncytiotrophoblast

Question 18

Define gastrula

Answer 18

A cup shaped embryo composed of 3 layers

Question 19

A primitive streak appears where?

Answer 19

In the epiblast

Question 20

A primitive node forms at the ________ end of the embryonic disc

Answer 20

Cranial

Question 21

The hormone that trigger meiosis is what?

Answer 21

FSH

Question 22

A glycoprotein shell found around a zygote?

Answer 22

Zona pellucida

Question 23

What grows into the endometrium?

Answer 23

Syncytiotrophoblast

Question 24

hCG can be detected by a pregnancy test by ______

Answer 24

The end of the 2nd week

Question 25

Intraembryonic mesodermal cells around the primitive node form a tube called what?

Answer 25

Notochord process

Question 26

The hypoblast of a bilaminar embryo becomes what?

Answer 26

Endoderm

Question 27

Endoderm is formed by what process?

Answer 27

Migrating epiblast cells invade the hypoblast

Question 28

An important structure located on the head of the sperm?

Answer 28

Acrosome

Question 29

What process is required to make a spermatozoa motile?

Answer 29

Capacitation

Question 30

A thickening of cells seen on the bilaminar embryo is called

Answer 30

Prechordal plate

Question 31

The first ingressing epiblast cells during gastrulation invade the ________ and displace its cells

Answer 31

Hypoblast

Question 32

For the notochordal process to become the notochord, it must _____________

Answer 32

Fuse with the underlying endoderm

Question 33

Is extra or intraembryonic mesoderm formed first?

Answer 33

Extraembryonic mesoderm

Question 34

Cells migrate from which structure to then form the primary yolk sac?

Answer 34

Hypoblast

Question 35

Some endometrial cells degenerate and provide nutrition to the embryo, these cells are called?

Answer 35

Decidual cells

Question 36

Paraxial mesoderm forms

Answer 36

Somites

Question 37

Ectoderm forms

Answer 37

Neural tube

Question 38

Endoderm forms

Answer 38

Gut tube

Question 39

Lateral plate mesoderm forms

Answer 39

Appendicular skeleton

Question 40

Intermediate mesoderm forms

Answer 40

Urinary and reproductive systems

Question 41

The ectoderm above the primitive node thickens to form a _______?

Answer 41

Neural plate

Question 42

Within the embryo primordia of body cavities are formed by _______?

Answer 42

Coelomic spaces

Question 43

Which tissue separates to form primitive body cavities?

Answer 43

Lateral plate mesoderm

Question 44

Blood cells for the embryo develop from endothelial cells from which structure?

Answer 44

Umbilical vesicle

Question 45

Before neural folding, the ventral surface of the embryo is formed by?

Answer 45

Endoderm

Question 46

In cardiovascular development, 2 vitelline veins fuse to form the

Answer 46

Sinus venosus

Question 47

What germ layer is the first to form?

Answer 47

Endoderm

Question 48

Which structure increases the surface area for diffusion across the forming placenta?

Answer 48

Chorionic villi

Question 49

Early in development, the word “coelomic” is used to describe what?

Answer 49

Body cavities

Question 50

What structure is most caudal in the embryo?

Answer 50

Cloacal membrane

Question 51

Blood vessel formation starts within which structure?

Answer 51

extraembryonic mesoderm

Question 52

Neural crest cells are formed from what?

Answer 52

Neural folds

Question 53

The urinary system will begin to develop within which structure?

Answer 53

Intermediate mesoderm

Question 54

A population of mesodermal cells migrates cranially from the primitive node and forms the:

Answer 54

Notochordal process

Question 55

Somites start off as balls of mesoderm and then develop into:

Answer 55

myotome dermatome sclerotome

Question 56

what structure divides into a splanchnic and somatic layer?

Answer 56

Lateral plate mesoderm

Question 57

at the end of gastrulation, the embryo is called

Answer 57

Gastrula

Question 58

vertebrae develop from what?

Answer 58

Sclerotome

Question 59

Before a blastocyst can implant, is has to break free from the __________

Answer 59

zona pellucida

Question 60

during embryonic folding, which germ layer wraps the embryo?

Answer 60

Ectoderm