01 - GI anatomy Flashcards
1
Q
A
2
Q
- what nerve innervates muscles of mastication?
A
- CN V (trigeminal)
3
Q
swallowing involves what three CN?
A
9,10,12
(glossopharyngeal, vagus, and hypoglossal)
4
Q
(stomach)
- relatively small in size
- pretty fast transit
- small amount of enzymatic and microbial digestion
A
5
Q
(small intestine)
- primary site of enzymatic digestion
A
6
Q
(small intestine)
(proteins)
- broken down by brush border enzymes
- individual AA and dipeptides are absorbed
- requires what as cotransporter?
A
- sodium
7
Q
(SI)
(carb digestion)
- sucrase, lactase, maltase
- require Na as transporter
- what hydrolyzes starch into disaccarides and trisaccarides for absorption?
A
- pancreatic amylase
8
Q
(SI)
(fat digestion)
- fats emulsified in SI - require pancreatic and biliary secretions
- pancreatic lipase + TGs ->
- bile salts are absorbed where to go back to liver?
A
- beta-monoglycerides and FFA (solubilized by bile salts and taken up into lymphatics)
- ileum
9
Q
(SI)
(water)
A
10
Q
(LI)
- cecum, large colon, transverse colon, small colon, and rectum
- primary digestive fxn is production of what?
A
- volatile fatty acids
11
Q
A
12
Q
(LI)
- primary digestive processes in cecum and colon are what?
- mostly what kind of bacteria?
- products similar to rumen - what are they?
- VFA absorbed from lumen provide what % energy req of adult horses?
A
- fermentative
(no specific digestive enzymes either secreted or bound to cells)
- anaerboes
- VFAs: acetic acid -> propionic acid -> butyric acid
- 75%
13
Q
(nutrient absorption: LI)
- most absorption of VFAs occur where?
- VFA absorption dependent on what electrolyte?
A
- cecum and ventral colon
- Na
14
Q
A
15
Q
A