Circulating hydrogen ions and bicarbonate are shifted through the carbonic acid (H2CO3) intermediate to make more CO2 via the enzyme carbonic anhydrase according to the following reaction: 
  
    
      
        
          
            H
            C
            
              O
              
                3
              
              
                −
              
            
            +
            
              H
              
                +
              
            
            →
            
              H
              
                2
              
            
            C
            
              O
              
                3
              
            
            →
            C
            
              O
              
                2
              
            
            +
            
              H
              
                2
              
            
            O
          
        
      
    
    {\displaystyle {\rm {HCO_{3}^{-}+H^{+}\rightarrow H_{2}CO_{3}\rightarrow CO_{2}+H_{2}O}}}
   This causes decreased circulating hydrogen ion concentration, and increased pH (alkalosis).
Respiratory alkalosis is a medical condition in which increased respiration elevates the blood pH beyond the normal range (7.35–7.45) with a concurrent reduction in arterial levels of carbon dioxide. This condition is one of the four primary disturbance of acid–base homeostasis. Signs and symptoms
Signs and symptoms of respiratory alkalosis are as follows:
Palpitation
Tetany
Convulsion
Sweating

Causes
Respiratory alkalosis may be produced as a result of the following causes:

Mechanism
The mechanism of respiratory alkalosis generally occurs when some stimulus makes a person hyperventilate. The increased breathing produces increased alveolar respiration, expelling CO2 from the circulation. This alters the dynamic chemical equilibrium of carbon dioxide in the circulatory system.