Exam 2 Practice Questions Flashcards
Left and right bronchial buds will give rise to ________
Lungs
The sclerotome of somites on the right and left fuse to form a ___________?
Centrum
The primitive heart tubes expands into 5 dilated regions, which of them becomes the future right ventricle?
Bulbus cordis
On day 22 an outgrowth from the foregut produces the ___________?
Respiratory diverticulum
What forms within the septum primum of the embryonic heart?
Foramen ovale
The respiratory diverticula becomes surrounded by ____________ to form the bulk of the future lung?
splanchnic mesoderm
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
B) splanchnic mesoderm
Development of the respiratory system is closely linked to development of the _____________ system?
Digestive
Endocardial tubes form within which structure?
cardiogenic mesoderm
The respiratory system develops from which germ layer?
Endoderm
Limb buds develop from a group of cells within the ________?
Somatic mesoderm
What is the gut derivative for the ascending colon?
Midgut
What is the gut derivative for the liver?
Foregut
What is the gut derivative for the duodenum?
Midgut
What is the gut derivative for the stomach?
Foregut
What is the gut derivative for the rectum?
Hindgut
An important signal to maintain pregnancy and the corpus luteum is released from which structure?
Syncytiotrophoblast
Define gastrula
A cup shaped embryo composed of 3 layers
A primitive streak appears where?
In the epiblast
A primitive node forms at the ________ end of the embryonic disc
Cranial
The hormone that trigger meiosis is what?
FSH
A glycoprotein shell found around a zygote?
Zona pellucida
What grows into the endometrium?
Syncytiotrophoblast
hCG can be detected by a pregnancy test by ______
The end of the 2nd week
Intraembryonic mesodermal cells around the primitive node form a tube called what?
Notochord process
The hypoblast of a bilaminar embryo becomes what?
Endoderm
Endoderm is formed by what process?
Migrating epiblast cells invade the hypoblast
An important structure located on the head of the sperm?
Acrosome
What process is required to make a spermatozoa motile?
Capacitation
A thickening of cells seen on the bilaminar embryo is called
Prechordal plate
The first ingressing epiblast cells during gastrulation invade the ________ and displace its cells
Hypoblast
For the notochordal process to become the notochord, it must _____________
Fuse with the underlying endoderm
Is extra or intraembryonic mesoderm formed first?
Extraembryonic mesoderm
Cells migrate from which structure to then form the primary yolk sac?
Hypoblast
Some endometrial cells degenerate and provide nutrition to the embryo, these cells are called?
Decidual cells
Paraxial mesoderm forms
Somites
Ectoderm forms
Neural tube
Endoderm forms
Gut tube
Lateral plate mesoderm forms
Appendicular skeleton
Intermediate mesoderm forms
Urinary and reproductive systems
The ectoderm above the primitive node thickens to form a _______?
Neural plate
Within the embryo primordia of body cavities are formed by _______?
Coelomic spaces
Which tissue separates to form primitive body cavities?
Lateral plate mesoderm
Blood cells for the embryo develop from endothelial cells from which structure?
Umbilical vesicle
Before neural folding, the ventral surface of the embryo is formed by?
Endoderm
In cardiovascular development, 2 vitelline veins fuse to form the
Sinus venosus
What germ layer is the first to form?
Endoderm
Which structure increases the surface area for diffusion across the forming placenta?
Chorionic villi
Early in development, the word “coelomic” is used to describe what?
Body cavities
What structure is most caudal in the embryo?
Cloacal membrane
Blood vessel formation starts within which structure?
extraembryonic mesoderm
Neural crest cells are formed from what?
Neural folds
The urinary system will begin to develop within which structure?
Intermediate mesoderm
A population of mesodermal cells migrates cranially from the primitive node and forms the:
Notochordal process
Somites start off as balls of mesoderm and then develop into:
myotome
dermatome
sclerotome
what structure divides into a splanchnic and somatic layer?
Lateral plate mesoderm
at the end of gastrulation, the embryo is called
Gastrula
vertebrae develop from what?
Sclerotome
Before a blastocyst can implant, is has to break free from the __________
zona pellucida
during embryonic folding, which germ layer wraps the embryo?
Ectoderm
