Acid - Base Balance A&P
What are 3 mechanisms the body uses to regulate pH?
Buffers, respiratory regulation, metabolic regulation
Which is the quickest
Buffers fast soak up excess H or not enough to give off
Which is the slowest
What are three main buffers
Proteins, phosphates, carbonic acid (bicarb)
How does the respiratory system help regulate pH
Getting rid of co2 adjusts pH, second fastest
Relationship between co2 and pH
Getting rid of co2 adjusts ph. If co2 goes up, hydrogen up and ph goes down, acidic. Co2 goes down, less H, ph goes up making alkaline.
Lose H, save bicarb
lose bicarb, save H
How does the metabolic system help regulate pH
Kidneys can retain HCO3 in the body or dump into urine. Or retain H in the body or dump into urine. Alkaline gets rid of bicarb, save H. Acidic saves bicarb and gets rid of H.
Hco3- (bicarb) & pH
If higher bicarb makes alkaline, if lower bicarb makes acidic.
loose co2 by increasing respirations
save co2 by decreasing respirations
Causes of respiratory acidosis
Causes of respiratory alkalosis
Causes of metabolic acidosis
^ in non-carbonic acids or loss of bicarb
Causes of metabolic alkalosis
excessive loss of metabolic acids, excessive bicarb intake