If cells secrete acids and bases to keep the proper pH for phosphatases to work properly, then what is needed from cells for phosphatases to keep the proper pH?

Answer choices:
- plasma
 - secretion of bases only
 - secretion of proteins
 - metabolic reaction
 - it helps plants in growing
 - Positive charges
 - Transfers energy
 - secretion of acids and bases

 

        secretion of acids and bases  