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After small doses of atropine, the secretory response of the cat's submaxillary gland to sympathetic stimulation is increased by previous stimulation of the chorda tympani, although the latter nerve is itself unable to cause any secretion. 2. Stimulation of the chorda tympani must therefore cause a true increase in the irritability of the secretory cells to sympathetic stimulation.
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MacIntosh et al. (1935) studied this question.
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