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NBDE PART 1 BIOCHEM/PHYSIOLOGY > GI system > Flashcards

Flashcards in GI system Deck (17):
1

intrinsic factor is essential for absorption of __ in the __

Vitamin B12, ileum (TO REMEMBER ILEIUM look at Intrinsic starts with I)
(to remember look at the word intrinsic factor = it is long! Cobalamin = B12 = the long one

2

intrinsic factor is secreted by__ cells

parietal = PARI = Produces Acid and Releases Intrinsic Factor. parietal cells aka oxyntic = to remember = o is the letter right before p

3

the pancreas is an endocrine gland because it produces what hormones from what cells

islets of Langherhans = alpha cells make glucagon, beta cells make insulin, and delta cells make somatostatin

4

the endocrine pancreas therefore is a key regulator of ____

blood glucose. when glucose is high releases insulin, when glucose is low releases glucagon

5

the pancreas is what shape

L shaped = looks like an upside down L. It has 3 regions: head is closest to the duodenum, elongated body and tail.

6

the pancreas is an exocrine gland because it release what through ducts?

pancreatic juice: source of HCO3- = neutralizes gastric acid and also contains digestive enzymes

7

Histology of the pancreas: H + E stain = hematoxylin and eosin stain:
1. the islets of langherans stain lighter or darker?
2. the acini cells stain lighter or darker.

1. islets stain lighter, looks like an island
2. acini stain darker.

8

the ___ cells are the exocrine cells of the pancreas

acini cells- they make the pancreatic juice. that is their only job

9

the __ cells are the endocrine cells of the pancreas

cells of Langherhans

10

what is the pH of pancreatic juice

7.6-8.2

11

how much pancreatic juice is released per day

1.5 L (1500mL)

12

the pancreas sits behind or in front of the stomach

behind

13

pancreatic juice is released into the ___duct which has the ___ sphincter

main bile duct
pancreatic duct sphincter

14

pancreatic juice is mostly secreted into the duodenum when we

eat.
but always a basal amount secreted when we are not eating

15

bile and intestinal juices are also neutral/alkaline and along with pancreatic juice will raise the duodenal pH to

6-7

16

papilla of Vater is the opening to the

duodenum wall

17

both the common bile duct and the pancreatic duct are controlled by the sphincter of

oddi