Protein Metabolism::

proteins are the essential constituents of all living cells they are hydrolysed to amino acids by proteolytic enzymes and enter the portal vein to go to the liver Some amino acids are used in intact form while some amino acids are broken down and converted into urea and ammonia which are then excreted Amino acids break down and liberate energy while breaking down they exert a specific stimulating action on tissue metabolism This is Specific Dynamic Action (SDA) of proteins during the process of deamination ammonia and alpha ketonic acids are formed from nitrogenous and non nitrogenous parts of proteins respectivelyhttps://medicaleducatio.blogspot.com/2022/03/human-anatomy-and-physiology_26.html