Maintaining a physiological pH in an organism is essential. Which of the following statements are true?
1. The physiological pH ranges from pH 6.5 to pH 8.0.
2. The human body uses mainly two buffering systems, the dihydrogen phosphate-hydrogen phosphate system in cells and the carbonic acid-bicarbonate system in blood.
3. When the pH in animal cells drops below 6.8 or rises above 7.8, animal cells suffer irreparable damage.
4. Acidemia is a condition when the pH in human blood drops below 7.2.
View Available Hint(s)
1 and 3 are correct.
1, 2, and 3 are correct.
1, 2, 3, and 4 are correct.
4 is correct.