Fact 1: Cells secrete acids and bases to maintain the proper pH for enzymes to work.

Fact 2: Enzyme systems efficiency is pH dependant.

Given the two facts above, answer the question "Cells secrete acids and bases to maintain enzyme systems what?" with the following options: 
- breakdown
 - failure
 - efficiency
 - it needs them
 - kinetic
 - health
 - distractions
 - state


 

   efficiency      