Exam 6 (GU) Flashcards
(169 cards)
long continuous 4-layer tract from mouth to anus
- mucosa (innermost layer)
- submucosa
- muscle
- serosa
GI organs
mouth
esophagus
stomach
intestines (large & small)
rectum
anus
GI-associated organs
liver
gall bladder
pancreas
peritoneum - mesentery & omentum
autonomic
parasympathetic response
sympathetic response
parasympathetic response
increased peristalsis (excitatory)
sympathetic response
decrease peristalsis (inhibitory)
enteric
meissner (submucosal) plexus
auerbach (myenteric) plexus
meissner (submucosal) plexus
secretions, sensations
auerbach (myenteric) plexus
GI motility
What percentage of CO does the GI tract receive?
25-35%
25% at rest
35% right before digesting food
Vessels involved in the GI tract
celiac artery
superior mesenteric artery (SMA)
inferior mesenteric artery (IMA)
empties into the portal vein
Where does the celiac artery go?
stomach & duodenum
where does the superior mesenteric artery (SMA) go?
small intestine and mid-large intestine
where does the inferior mesenteric artery (IMA) go?
distal large intestine to anus
where is the portal vein?
liver
upper GI consists of
mouth
pharynx
esophagus
stomach
small intestines
mouth consists of
lips (speech)
oral cavity (teeth, mastication)
tongue (chewing, talking, taste, speech)
salivary glands (lubricate food) –> parotid, submaxillary, sublingual (these are glands - salivary amylase is released and breaks down food)
pharynx consists of
naso-, oro-, & laryngeal
initiate swallowing reflex
esophagus consists of
hollow tube with striated skeletal muscle and smooth muscle
2 sphincters
stomach consists of
(LUQ)
fundus
body
antrum/pylorus (& sphincter)
4-layer wall
function of the stomach
store food
mix with gastric secretions
empty into small intestine
chyme
stomach secretions
pepsinogen –> protien
HCl –> converts pepsinogen to pepsin
lipase –> fats
intrinsic factor –> contribute to vit B12 absorption
small intestine consists of
coiled tube from the pylorus to the ileocecal valve
alkaline
microvilli
covered by the visceral peritoneum
what are the sections of the small intestine?
duodenum
jejunum
ileum
intestinal villi & microvilli