Step 1: Identify the decision, Step 2: Gather relevant information, Step 3: Identify the alternatives, Step 4: Weigh the evidence, Step 5: Choose among alternatives, step 6: Take action, Step 7: Review your decision & its consequences me I personally think that step 1: because if you don't identify your problem you won't be able to know what options you have.
In the respiratory membrane, the compensation activity that takes is the elimination of CO₂ to adjust bicarbonate to carbonic acid it to its normal ratio of 20 : 1 by increase respiratory rate.