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(D) The Hering-Breuer reflex is a mechanism that prevents over-inflation of the lungs.When the lungs inflate to a critical level,the stretch receptors

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(D) The Hering-Breuer reflex is a mechanism that prevents over-inflation of the lungs.When the lungs inflate to a critical level,the stretch receptors located in the walls of the bronchi and bronchioles are stimulated.These receptors send inhibitory impulses via the vagus nerve (cranial nerve $X$) to the expiratory centre in the medulla oblongata.This signal inhibits the inspiratory centre,thereby terminating inspiration and allowing expiration to occur.

Which cranial nerve carries impulses to the expiratory centre in the medulla oblongata when stretch receptors are stimulated by the inflation of lungs to a critical level?

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