Respiratory pathway is

Explanation

Glucose is the favourite sulphate fr respiration as carbohydrates are first converted into glucose. Prior to used for respiration. Fats are acetyl CO-A are broken down into glycerol and fatty, which is further degraded into acetyl Co-A while protein is degraded into, smaller units acids.
Respiratory process involves the breaking down of substrate is catabolic process. Sometime the fatty acid is required them synthesis of it occurs by withdrawing actely Co-A. This synthesising phase is the anabolic process.
Thus, respiratory pathway, involves the catabolic process (break down) and anabolic pathway synthesis of molecules using respiratory intermediates frant link, it is called as an amphibolic pathway.