Which of the following physiological changes in blood chemistry is an indication of acidosis?

a. Releases hydrogen ions: Releasing hydrogen ions (H⁺) into the solution would lower the pH, making the solution more acidic. This is not the correct way to normalize a slightly acidic pH of 7.30.

b. Blinds hydrogen ions: This is likely a typographical error, and it should be "binds hydrogen ions." Binding hydrogen ions (H⁺) would reduce the concentration of free hydrogen ions in the solution, thereby raising the pH and making the solution less acidic. This is the correct mechanism to normalize the pH of 7.30 to a more neutral level.

c. Creates additional hydrogen ions: Creating additional hydrogen ions would further lower the pH, making the solution more acidic. This is not how a buffer system would normalize a slightly acidic pH.

d. Destroys excess hydrogen ions: While this option might seem correct, it is not typically how chemical buffer systems operate. Buffer systems usually bind (or release) hydrogen ions rather than destroy them.

a: Basal ganglia - The basal ganglia are involved in motor control and coordination but not in respiratory regulation.

b: Parietal lobe - The parietal lobe is involved in sensory processing and spatial awareness but not in respiratory regulation.

c. Medulla: The medulla oblongata, specifically the respiratory center within it, is responsible for the involuntary control of respiration, including setting the basic rhythm of breathing and responding to changes in blood pH and oxygen levels.

d: Hypothalamus - The hypothalamus regulates various physiological processes, including temperature regulation and hormone secretion, but not respiration.