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2427 Physiology

Which one of the following statements regarding the regulation of gastrointestinal function is true?

AThe main sympathetic nerve supply to the digestive tract is the vagus.
BIn general, sympathetic stimulation is excitatory to digestive activity.
CSalivary secretion is stimulated by both branches of the autonomic nervous system, although not to the same degree.
DParasympathetic stimulation of the salivary glands produces a saliva rich in mucus.
Physiology
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