A 61-year-old woman with a 40-pack-a year history of cigarette smoking and a diagnosis of chronic obstructive pulmonary disease (COPD) is experiencing an increase^{in arterial levels of CO}2^{. This change has been detected in the client's medulla, aortic} bodies, and carotid bodies, stimulating the inspiratory center in the medulla oblongata, which has in turn caused the diaphragm to contract more forcefully and increase the respiratory rate. Which of the following terms best describes the role of the inspiratory center?

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The Answer is A

A 61-Year-Old Woman with a 40-Pack-A Year History of Cigarette