Which of the Following Statements Are True of Acid-Base Regulation

Which of the following statements are true of acid-base regulation? (Read carefully and select all of the correct statements.)

A) The respiratory system responds to metabolic acidosis by decreasing the breathing rate to conserve CO₂.
B) The respiratory system is only about 10% effective at correcting a long-term pH imbalance.
C) Respiratory acidosis is caused by anything that decreases the rate or efficiency of breathing.
D) Correction of a long-term pH imbalance depends primarily on the kidneys.
E) The kidneys respond to acidosis by retaining hydrogen ions.
F) If the pH of the blood is 7.5,the blood is slightly alkaline,but physiologically is "too alkaline."
G) A state of acidosis causes increased nerve activity that may progress to seizures.
H) A state of alkalosis causes confusion and impairment of consciousness.