Sensory input to the dorsal respiratory neurons from the lungs, airways, and peripheral chemore-ceptors is provided via which nerves?

1. Glossopharyngeal
2. Phrenic
3. Vagus
4. Trigeminal
a. 1 and 2 only
b. 1, 2, and 4 only
c. 1 and 3 only
d. 2 and 3 only

ANS: C
The vagus and glossopharyngeal nerves transmit many sensory impulses to the DRGs from the lungs, airways, peripheral chemoreceptors, and joint proprioceptors. These impulses modify the basic breathing pattern generated in the medulla.