The anatomy and physiology teacher is discussing ventilation with the nursing students. What would the instructor say causes an increased respiratory rate?
A) Increased stimulation of the respiratory center
B) Decreased stimulation of the respiratory center
C) Increased O2
D) Decreased pH
A
Feedback:
Respiration, or the act of breathing to allow gas exchange, is controlled by the central nervous system. The inspiratory muscles—diaphragm, external intercostal muscles, and abdominal muscles—are stimulated to contract by the respiratory center in the medulla. The medulla receives input from chemoreceptors (neuroreceptors sensitive to carbon dioxide and acid levels) to increase the rate and/or depth of respiration to maintain homeostasis in the body.
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