Omasum - Funções fisiológicas

Ca-sensitive Na transport in sheep omasum.

Na transport across a preparation of sheep omasum was studied. All tissues exhibited a serosa-positive short-circuit current ( I sc), with a range of 1-4 μeq ⋅ h-1 ⋅ cm-2. A Michaelis-Menten-type kinetic was found between the Na concentration and the I sc(Michaelis-Menten constant for transport of Na = 6.7 mM; maximal transport capacity of Na = 4.16 μeq ⋅ h-1 ⋅ cm-2). Mucosal amiloride (1 mM), ...

Microbial activity in the omasum.

In a ruminant the omasum forms a relatively small ovoid chamber connecting the reticulum to the abomasum. The two orifices are fairly close together and connected by a channel in the omasal wall. The internal structure has been likened to a loosely-closed book with sheets of tissue forming the leaves and the spine opposite to the channel. ‘The omasal leaves are of various sizes; all leaves atta...

Hipertensão arterial : o endotélio e suas múltiplas funções

Arterial hypertension: endothelium and multiples functions The healthy endothelium normally displays anticoagulant, vasodilatory and anti-inflammatory activities that play a central role in homeostasis. Dysfunction of the endothelium is a common feature of various cardiovascular diseases such as arterial hypertension. A normal endothelium protects against the development of vascular lesions by ...

Ultrasonography of the omasum in 30 Saanen goats

This report describes the findings of ultrasonographic examination of the abomasum in 30 goats. A 5.0 MHz linear transducer was used to scan the left and right paramedian regions, the linea alba and the right abdominal wall of standing goats. The abomasum appeared as a heterogeneous, moderately echogenic structure with echogenic stippling. The abomasum could be seen from the linea alba in all t...

Characterization of Urea Transport Mechanism across the Omasum Epithelium in Sheep