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Old 02-08-2012
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Default FA: GIT section missing a lot of key points?

The FA GIT section in the physiology part doesn't mention much to anything about the small intestine, large intestine, stomach etc in terms of the physiological function of each part. Why? is it because it's not high yield?
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Old 02-08-2012
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Anyone?
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Old 02-08-2012
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Don't know about being high yield, but yeah its missing a lot of things. It does touch on some areas under Carb digestion/absorption, Vitamin/mineral absorption. I think its important so I've added a lot of stuff to my FA.

Here's some things you might want to add.


ABSORPTION:

Na/Glucose: Secondary active co-transport. Na gradiaent used to power transporter into cell from lumen. Glucose then enters blood by facilitated or simple diffusion.

Galactose: same mechanism as glucose. Increased galactose can inhibit glucose uptake.

Fructose: Facilitated diffusion

Di-Tri peptides: secondary active transport with Na.

Individual AA: secondary active symport with Na. Then enter blood via simple or facilitated diffusion.

Short Chain FA: diffuse from lumen to cell then simple diffusion into blood

Duodenum: Absorbs Na, water, Ca, Iron, vitamins

Jejunum: Absorbs Na, Cl, K, water, HCO3-, folate (very similar to PCT in kidney)

Ileum: absorbs Na, Cl, K, water, bile salts, intrinsic factor - B12, HCO3- is secreted out in exchange for Cl in

Colon: absorbs Na, Cl, water, HCO3- and K secretion (very similar to collecting ducts). Diarrhea causes hypokalemia (excess K secretion) and hyperchloremic non anion gap metabolic acidosis (increased functioning of Cl, HCO3- exchanger)


Trigylcerides are BIG but lipid soluble so moved from intestinal epithelial cell to blood by diffusion.

No cell ACTIVELY absorbs water.
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Quote:
Originally Posted by haga View Post
Don't know about being high yield, but yeah its missing a lot of things. It does touch on some areas under Carb digestion/absorption, Vitamin/mineral absorption. I think its important so I've added a lot of stuff to my FA.

Here's some things you might want to add.


ABSORPTION:

Na/Glucose: Secondary active co-transport. Na gradiaent used to power transporter into cell from lumen. Glucose then enters blood by facilitated or simple diffusion.

Galactose: same mechanism as glucose. Increased galactose can inhibit glucose uptake.

Fructose: Facilitated diffusion

Di-Tri peptides: secondary active transport with Na.

Individual AA: secondary active symport with Na. Then enter blood via simple or facilitated diffusion.

Short Chain FA: diffuse from lumen to cell then simple diffusion into blood

Duodenum: Absorbs Na, water, Ca, Iron, vitamins

Jejunum: Absorbs Na, Cl, K, water, HCO3-, folate (very similar to PCT in kidney)

Ileum: absorbs Na, Cl, K, water, bile salts, intrinsic factor - B12, HCO3- is secreted out in exchange for Cl in

Colon: absorbs Na, Cl, water, HCO3- and K secretion (very similar to collecting ducts). Diarrhea causes hypokalemia (excess K secretion) and hyperchloremic non anion gap metabolic acidosis (increased functioning of Cl, HCO3- exchanger)


Trigylcerides are BIG but lipid soluble so moved from intestinal epithelial cell to blood by diffusion.

No cell ACTIVELY absorbs water.

Thanks a lot for replying and I'll add those things as well. Thanks!!
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Old 02-08-2012
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Quote:
Originally Posted by haga View Post
Don't know about being high yield, but yeah its missing a lot of things. It does touch on some areas under Carb digestion/absorption, Vitamin/mineral absorption. I think its important so I've added a lot of stuff to my FA.

Here's some things you might want to add.


ABSORPTION:

Na/Glucose: Secondary active co-transport. Na gradiaent used to power transporter into cell from lumen. Glucose then enters blood by facilitated or simple diffusion.

Galactose: same mechanism as glucose. Increased galactose can inhibit glucose uptake.

Fructose: Facilitated diffusion

Di-Tri peptides: secondary active transport with Na.

Individual AA: secondary active symport with Na. Then enter blood via simple or facilitated diffusion.

Short Chain FA: diffuse from lumen to cell then simple diffusion into blood

Duodenum: Absorbs Na, water, Ca, Iron, vitamins

Jejunum: Absorbs Na, Cl, K, water, HCO3-, folate (very similar to PCT in kidney)

Ileum: absorbs Na, Cl, K, water, bile salts, intrinsic factor - B12, HCO3- is secreted out in exchange for Cl in

Colon: absorbs Na, Cl, water, HCO3- and K secretion (very similar to collecting ducts). Diarrhea causes hypokalemia (excess K secretion) and hyperchloremic non anion gap metabolic acidosis (increased functioning of Cl, HCO3- exchanger)


Trigylcerides are BIG but lipid soluble so moved from intestinal epithelial cell to blood by diffusion.

No cell ACTIVELY absorbs water.
That's some good info
THanks
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Old 02-08-2012
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Quote:
Originally Posted by usmle_taker View Post
Thanks a lot for replying and I'll add those things as well. Thanks!!
I don't know what point you've reached with your studying but the more you study, you will find out that FA as a whole doesn't have enough information in it.

The 4 units that I've had to add a lot to are Renal, Endo, Neuro and Micro.

The others I've also had to add things, but generally they haven't been as bad as these 4.

GIT was one of the better units.
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  #7  
Old 02-08-2012
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Quote:
Originally Posted by haga View Post
I don't know what point you've reached with your studying but the more you study, you will find out that FA as a whole doesn't have enough information in it.

The 4 units that I've had to add a lot to are Renal, Endo, Neuro and Micro.

The others I've also had to add things, but generally they haven't been as bad as these 4.

GIT was one of the better units.
i'm so glad i'm not the only one who feels this way. I'm at the point where i'm adding notes to FA for the final revision and i'm noticing FA isn't so great after all because of all the additions there is to make.
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