Small Intestine, Absorption and Secretion

2004 ◽  
pp. 477-481
Author(s):  
Marshall H. Montrose
Keyword(s):  
Small Intestine ◽  
Small Intestine Absorption

Intestinal distribution of intrinsic factor and vitamin B12 absorption

1965 ◽  
Vol 208 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Kunio Okuda ◽  
Katsumi Sasayama
Keyword(s):  
Small Intestine ◽  
Vitamin B12 ◽  
Large Intestine ◽  
Intrinsic Factor ◽  
Vitamin B ◽  
Vitamin B12 Absorption ◽  
Small Intestine Absorption

Evidence is presented that intrinsic-factor (IF) activity is present in the small intestine as far down as the ileal end. Physiologic doses of radioactive vitamin B12 without IF were applied directly into various levels of the intestine by surgical and other means in man and rats, and significant absorption was obtained from the small intestine. Absorption inhibition by ethylenediaminetetraacetate and its counteraction by Ca ion demonstrated that such absorption was dependent on IF action. The large intestine was shown to be incapable of physiologic absorption of vitamin B12, and IF was totally ineffective. It is proposed that physiologically, gastric IF descends with some activity in the small intestine, where more of the food vitamin B12 is liberated by digestion and subjected to IF.

Peculiarities of small intestine absorption function in critically burned patients

1992 ◽  
Vol 11 ◽  
pp. 104
Author(s):  
N.V. Pryadkin ◽  
T.L. Zaets ◽  
A.V. Tarasov ◽  
V.N. Dutikov
Keyword(s):  
Small Intestine ◽  
Absorption Function ◽  
Small Intestine Absorption
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