Question

Action potentials in neurons in the inhalatory/inspiratory center of the medulla result in action potentials in the ________ nerves to the diaphragm, which in turn cause ________ of the muscle, resulting in a/an ________ in the volume of the thoracic cage

Answer 1

Action potentials from the medulla travel via the phrenic nerves to cause diaphragm contraction, which increases thoracic volume for inhalation.

Step-by-step explanation:

Action potentials in neurons in the inhalation/inspiratory center of the medulla result in action potentials in the phrenic nerves to the diaphragm, which in turn causes contraction of the muscle, resulting in an increase in the volume of the thoracic cage. This process is essential for breathing, as the contraction of the diaphragm muscle lowers its dome, creating a vacuum that allows air to flow into the lungs. The dorsal respiratory group (DRG) in the medulla oblongata plays a critical role in this process by stimulating the contraction of the diaphragm and intercostal muscles to induce inspiration.