Flashcards in Gastrointestinal Physiology Deck (55):
Plexus controlling the motility of the GI smooth muscle
Plexus controlling secretion and blood flow
Most potent amino acid stimuli for gastric secretion
Where is gastrin released?
G cells in antrum
Where is CCK released?
I cells in duodenum and jejunum
What lipids stimulate secretion of CCK?
Not triglycerides (cannot cross intestinal cell membrane)
Where is secretin released?
S cells in duodenum
Only GI hormone that is released in response to fat, protein and carbohydrates
Slow waves are least frequent in
Slow waves are most frequent in
Relaxes GI smooth muscle
Tonicity of saliva
Tonicity of pancreatic secretion
Second messenger for secretin
Second messenger for CCK
IP3 and Ca2+
Which lipid is not contained in micelles
Site of secretion of intrinsic factor
The autonomic nervous system controls gut motility by
changing which of the following?
A) Pacemaker discharge frequency
B) Slow wave frequency
C) Spike potential frequency
spike potential frequency
What is the effect of hyperosmotic solution in the intestine on acid secretion?
What is the effect of isoosmotic solution in the intestine on acid secretion?
muscle layers of the stomach
most potent stimulti for gastrin secretion
depolarization of slow waves
depolarization of spike potentials
parotid gland secretes what type of secretion?
submandibular gland secretes what type of secretion?
sublingual gland secretes what type of secretion?
which gastric glands contain mucus neck cells, parietal cells and chief cells?
oxyntic glands (body)
which gastric glands contain G cells and mucus cells?
pyloric glands (antrum)
gastric cell secreting histamine
gastric cell secreting serotonin
majority of gastric acid secretion: cephalic phase, gastric phase or intestinal phase?
CCK-A receptors are found in
CCK-B receptors are found in
Cholic acid and chenodeoxycholic acid are primary or secondary bile acids?
primary bile acids
deoxycholic acid is from cholic or chenodeoxycholic acid?
lithocholic acid is from cholic or chenodeoxycholic acid?
absorption of glucose and galactose from lumen to intestinal cell
absorption of fructose from lumen to intestinal cell
absorption of glucose, galactose and fructose from intestinal cell to blood
is pepsin essential for protein digestion?
all lipids go to the lacteals except
small-chain fatty acids
Bile salts inactivate pancreatic lipase. What pancreatic coenzyme is secreted to prevent this from happening?
main site for water absorption
Potassium is absorbed in __ and secreted in __.
Potassium is absorbed in small intestine and secreted in large intestine.
primary ion secreted in intestinal lumen
where is iron absorbed?
most of the nutrients are absorbed where?
amino acids are cotransported with what ion?