Chemical buffer system Flashcards
Where are bicarbonate buffer systems found?
intracellular and extracellular fluids
what is the weak acid of the buffer
H2CO3
what is the weak base of the buffer
HCO3−
What do Excess hydrogen ions combine with
with bicarbonate ions to form carbonic acid
What does H+ and bicarbonate ions to form carbonic acids minimize?
the increase in H+ concentration in body fluids
What happens to carbonic acid in alkaline conditions
carbonic acid dissociates into hydrogen ions and bicarbonate ions
the H+ can neutralize excess base
Where is phosphate buffer system found?
intracellular and extracellular fluids; important in kidneys
In acidic conditions what does excess H+ + HPO42-=H2p04- do?
neutralizes excess acidity by binding H+ ions and removing them from the body fluids
In alaklin conditions what does H2PO4-= H+ +HPO42- do?
neutralizes excess base by releasing free H+ into body fluids
What does protein buffer system consist of?
of plasma proteins (albumins) in the blood, specific proteins in cells, and haemoglobin in red blood cells
In acidic conditions what does the protein buffer system do?
, the amino groups bind to H+ ions:
In base/ alkaline conditions what does the protein buffer system do?
the carboxyl groups release H+ ions:
