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The parasympathetic nervous system will be handling my body's after-dinner activities.
Some organs involved, their major nerve supply, and the effects of the nervous system on their functions:
Parotid glands - glossopharyngeal nerve (CN IX); controls volume of saliva
Heart - vagus nerve (CN X); regulates heart rate
Stomach - vagus nerve (CN X); digests food, secretes stomach acid
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My friend experienced a dangerous situation, thus causing her sympathetic nervous system or fight-or-flight response to be activated. This causes heart rate to increase, goosebumps, sweating, and trembling.