Changes in arterial pH can modify respiration rate and rhythm even when carbon dioxide and oxygen levels are normal.

Question

Quizplus · Accepted Answer

Changes in arterial pH can stimulate or depress respiratory centers in the brainstem, leading to modifications in respiration rate and rhythm, even if carbon dioxide and oxygen levels are within a normal range. This is due to the fact that the respiratory response to pH changes is one of the primary mechanisms that help regulate acid-base balance in the body. For instance, if the pH of the blood becomes too acidic, the respiratory system can compensate by increasing breathing rate and depth, which helps remove excess carbon dioxide and thus raises the pH back towards normal. Conversely, if the blood becomes too alkaline, the respiratory system can reduce ventilation to retain more carbon dioxide, which helps lower the pH towards normal. Therefore, alterations in arterial pH can have significant effects on respiratory function and gas exchange, as well as on overall metabolic regulation.

Changes in Arterial PH Can Modify Respiration Rate and Rhythm