201-400 Flashcards
What is the antidote for an overdose with: Acetaminophen?
N-Acetylcysteine
What is the antidote for an overdose with: Nitrates?
Methylene blue
What is the antidote for an overdose with: Lead?
EDTA (calcium disodium edetate), dimercaprol, succimer
What structure is derived from the prochordal plate?
The mouth
What is the only organ supplied by the foregut artery that is of mesodermal origin?
Spleen
In which direction and how far does the gut rotate?
Counterclockwise 270 degrees
What structure connects the primitive gut to the yolk sac?
The yolk stalk (vitelline duct)
What is the artery of the embryonic foregut?
The celiac artery
When does the primitive gut herniate out of the embryo?
6 weeks
When does it return back into the embryo?
10 weeks
What two pathologic conditions occur when the gut does not return to the embryo?
Omphalocele and gastroschisis
Around what structure does the midgut rotate?
Superior mesenteric artery
What three things cause the indifferent gonad to become a testis?
1.Testis-determining factor (TDF) from the short arm of the Y chromosome 2.Miillerian inhibiting factor (MIF) from Sertoli cells 3.Testosterone from Leydig cells
Where does the embryologic foregutend?
At the first part of the duodenum
What is the artery of the embryonic hindgut?
The inferior mesenteric artery
What three embryonic cell layers form the chorion?
- Cytotrophoblast 2. Symcytiotrophoblast 3. Extraembrvonic mesoderm
Which neuropore closes last?
Caudal-and it is the first to open, too.
What is the artery of the embryonic midgut?
The superior mesenteric artery
From where are nephrons derived embryonically?
Metanephros
What are the five derivatives of the ventral mesentery?
- Falciform ligament 2. Hepatoduodenal ligament 3. Hepatogastric ligament 4 and 5. Coronary and triangular ligaments of the liver. All else is derived from the dorsal mesentery.
When do the septum primum and the septum secundum of the heart fuse?
After birth
The cerebral cortex is a derivative of what?
The telencephalon
What is the adult structure found in the embryo as the: Umbilical vein?
Ligamentum teres
What is the adult structure found in the embryo as the: Ductus venosus?
Ligamentum venosum