GB Flashcards
The 4/5-week embryo develops a bud from the foregut that grows _____ (direction); the cranial portion becomes the _____ and the _____.
Cephalad
Liver
Hepatic bile ducts
In the _____ portion of the growing bud, a second bud develops, also called the _____, and this becomes the gall bladder and cystic duct.
caudal
diverticulum
This is a rare condition that results from the failure of the cystic bud to develop in the 4th week of intrauterine life.
agenesis of the GB
This condition often occurs with duplication of the cystic duct and may be diagnosed prenatally.
duplication of the GB
The GB’s main function is to
store bile
T or F? When stored in the GB, bile becomes less concentrated and therefore more powerful in its ability to do its work.
Why?
False
MORE concentrated = MORE powerful
This organ is often also removed automatically with gastric bypass surgery.
GB
What hormone is released with the ingestion of food (especially fats), that signals the relaxtion of the valve at the end of the CBD (the sphincter of _____) which lets the bile enter the small intestine.
cholecystokinin
Oddi
What does the release of cholecystokinin signal (2)
the relaxation of the sphincter of Oddi
the contraction of the GB
When the GB contracts, what happens?
It squirts the concentrated bile into the small intestine where it helps with the emulsification or breakdown of fats in the meal.
This is a muscular valve that controls the flow of digestive juices (bile and pancreatic juice) through the Ampulla of Vater into the second part of the duodenum.
Sphincter of Oddi
This is relaxed by the release of cholecystokinin (CCK).
Sphincter of Oddi
What 2 vessels merge at the Ampula of Vater?
CBD and Pancreatic Duct
This consists of cholesterol, lecithin, calcium, bile salts, acids and waste materials among other things.
Bile
What happens within bile that is a cause of gallstones?
the bile salts and cholesterol become umbalanced
T or F? Bile is continually being made and secreted by the liver in varying amounts into bile ducts.
true
Some of the bile that is made and secreted go directly into the _____ and some into the _____.
small intestines
GB
This also acts as a reservoir that uptakes excess bile when there is pressure in the bile ducts.
GB
The 2 major functions of bile are
1) emulsifies fats so that the body can use them
2) acts as an antioxident to help remove toxins from the liver
The GB lies in the _____ margin of the liver, between the RLL and LLL.
inferior
This vessel may be used to help find the GB fossa, which is in the same anatomic plane.
MHV
Most hepatic ultrasounds will see and use this as a landmark for the GB fossa.
MLF
The GB derives its blood supply from the _____.
cystic artery
The cystic artery arrises from the _____ and supplies the GB with blood.
RHA