Final answer:
The inspiratory center sends nerve impulses to the diaphragm via the phrenic nerve. The phrenic nerve is responsible for the muscle contractions that drive ventilation.
Step-by-step explanation:
The inspiratory center sends nerve impulses to the diaphragm via the phrenic nerve. The phrenic nerve is connected to the spinal cord at cervical levels 3 to 5 and is responsible for the muscle contractions that drive ventilation. It is important for breathing as it stimulates the diaphragm to contract, causing inspiration.