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Histology & Embryology > Exam 2 Practice Questions > Flashcards

Exam 2 Practice Questions Flashcards

1
Q

Left and right bronchial buds will give rise to ________

A

Lungs

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2
Q

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

A

Centrum

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3
Q

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

A

Bulbus cordis

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4
Q

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

A

Respiratory diverticulum

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5
Q

What forms within the septum primum of the embryonic heart?

A

Foramen ovale

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6
Q

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

A

splanchnic mesoderm

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7
Q

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

A

B) splanchnic mesoderm

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8
Q

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

A

Digestive

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9
Q

Endocardial tubes form within which structure?

A

cardiogenic mesoderm

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10
Q

The respiratory system develops from which germ layer?

A

Endoderm

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11
Q

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

A

Somatic mesoderm

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12
Q

What is the gut derivative for the ascending colon?

A

Midgut

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13
Q

What is the gut derivative for the liver?

A

Foregut

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14
Q

What is the gut derivative for the duodenum?

A

Midgut

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15
Q

What is the gut derivative for the stomach?

A

Foregut

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16
Q

What is the gut derivative for the rectum?

A

Hindgut

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17
Q

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

A

Syncytiotrophoblast

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18
Q

Define gastrula

A

A cup shaped embryo composed of 3 layers

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19
Q

A primitive streak appears where?

A

In the epiblast

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20
Q

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

A

Cranial

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21
Q

The hormone that trigger meiosis is what?

A

FSH

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22
Q

A glycoprotein shell found around a zygote?

A

Zona pellucida

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23
Q

What grows into the endometrium?

A

Syncytiotrophoblast

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24
Q

hCG can be detected by a pregnancy test by ______

A

The end of the 2nd week

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25
Q

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

A

Notochord process

26
Q

The hypoblast of a bilaminar embryo becomes what?

A

Endoderm

27
Q

Endoderm is formed by what process?

A

Migrating epiblast cells invade the hypoblast

28
Q

An important structure located on the head of the sperm?

A

Acrosome

29
Q

What process is required to make a spermatozoa motile?

A

Capacitation

30
Q

A thickening of cells seen on the bilaminar embryo is called

A

Prechordal plate

31
Q

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

A

Hypoblast

32
Q

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

A

Fuse with the underlying endoderm

33
Q

Is extra or intraembryonic mesoderm formed first?

A

Extraembryonic mesoderm

34
Q

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

A

Hypoblast

35
Q

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

A

Decidual cells

36
Q

Paraxial mesoderm forms

A

Somites

37
Q

Ectoderm forms

A

Neural tube

38
Q

Endoderm forms

A

Gut tube

39
Q

Lateral plate mesoderm forms

A

Appendicular skeleton

40
Q

Intermediate mesoderm forms

A

Urinary and reproductive systems

41
Q

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

A

Neural plate

42
Q

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

A

Coelomic spaces

43
Q

Which tissue separates to form primitive body cavities?

A

Lateral plate mesoderm

44
Q

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

A

Umbilical vesicle

45
Q

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

A

Endoderm

46
Q

In cardiovascular development, 2 vitelline veins fuse to form the

A

Sinus venosus

47
Q

What germ layer is the first to form?

A

Endoderm

48
Q

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

A

Chorionic villi

49
Q

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

A

Body cavities

50
Q

What structure is most caudal in the embryo?

A

Cloacal membrane

51
Q

Blood vessel formation starts within which structure?

A

extraembryonic mesoderm

52
Q

Neural crest cells are formed from what?

A

Neural folds

53
Q

The urinary system will begin to develop within which structure?

A

Intermediate mesoderm

54
Q

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

A

Notochordal process

55
Q

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

A

myotome
dermatome
sclerotome

56
Q

what structure divides into a splanchnic and somatic layer?

A

Lateral plate mesoderm

57
Q

at the end of gastrulation, the embryo is called

A

Gastrula

58
Q

vertebrae develop from what?

A

Sclerotome

59
Q

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

A

zona pellucida

60
Q

during embryonic folding, which germ layer wraps the embryo?

A

Ectoderm

Histology & Embryology (21 decks)

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