Vagi of an experimental animal were cut on both sides. What respiration changes will be observed?

Answer options

1. It will become deep and frequent
2. It will become deep and infrequent
3. No changes will be observed
4. It will become shallow and infrequent
5. It will become shallow and frequent

Explanation

The vagus nerve is the tenth cranial nerve or CN X, and interfaces with parasympathetic control of the heart, lungs, and digestive tract. Vagus nerves mediate the lowering of the heart rate and hence vagotomy (cutting of the vagus nerve) will lead to increased heartbeat (tachycardia) causing deep breathing and infrequent.