Final answer:
The nurse would anticipate observing an increase in the rate and depth of respirations in a client with elevated carbon dioxide and hydrogen ion levels and decreased oxygen in arterial blood.
Step-by-step explanation:
The nurse would anticipate observing an increase in the rate and depth of respirations in a client with elevated carbon dioxide and hydrogen ion levels and decreased oxygen in arterial blood. This is because the respiratory centers of the brain are stimulated by these changes, resulting in an increase in respiratory rate and depth to remove carbon dioxide from the blood more quickly and improve oxygenation.