Sympathetic input into the enteric nervous system

Sympathetic nervous control of epithelial fluid transport in the small intestine can be reflexly activated by deloading baroreceptors in the aorta and neck arteries and/or intrathoracic volume receptors. [...]sympathetic nerves are part of the homeostatic system controlling fluid and electrolyte content of the body. 8 Motility As noted in the introduction, the Falck-Hillarp technique showed that few adrenergic fibres reached the muscle layers of the gastrointestinal tract. [...]the magnitude of the sympathetic effect is dependent on ongoing activity in, for example, the vagal excitatory nerves to the smooth muscle layers in a manner similar to that described for sympathetic control of fluid and electrolyte transport (fig 1 C).