Sometimes acid that regurgitates from the stomach can irritate the phrenic nerve, causing it to fire spontaneously. What effect do you think this would have?

In this case, the phrenic nerve might restrict breathing by producing tension/spasms in the diaphragm.

In conclusion, the phrenic nerve might restrict breathing by producing tension/spasms in the diaphragm.

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The correct answer would be - difficulty in taking breaths and hiccups.

Explanation:

The phrenic nerve is a nerve that initiates from the cervical nerves and reaches to the innervate the diaphragm through the thorax. It is a bilateral nerve that is the only nerve that acts as a source of motor innervation to the diaphragm.

The acid present in the stomach stimulates the phrenic nerve which leads to damage to the lining an individual loses the ability to take automatic breaths, hiccups and other breathing problems take place as well.