Life: The Science of Biology 11th Edition

Published by W. H. Freeman
ISBN 10: 1-31901-016-4
ISBN 13: 978-1-31901-016-4

Chapter 48 - Gas Exchange - 48.5 - Breathing Is Homeostatically Regulated - 48.5 Recap - Learning Outcomes - Page 1040: 1

Answer

The respiratory rhythm is generated by a circuit in the brainstem. The brain signals to motor neurons in the thoracic spinal nerves to contract and expand the diaphragm, which can draw oxygen in or expel carbon dioxide.

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