THE activity of the smooth muscle in guinea-pig ileum has been investigated many times. The tissue preparation most often used for such investigations has been the isolated ileum. In a number of cases ...

The intestine is the most critical digestive organ and the largest immune organ in mammals, playing a central role in nutrient absorption, endocrine secretion, and defense against microorganisms.

Studies show that the adsorption of rabbit antiovalbumin-I$^{131}$ on guineapig ileum conforms to a Langmuirian isotherm, and that the physiological response to challenge with antigen depends upon the ...