Discuss "The respiratory pathway is an amphibolic pathway".

(N/A) Respiration is generally considered a catabolic process because various substrates are broken down to release energy.
Carbohydrates are broken down into glucose before entering the respiratory pathway.
Fats are converted into fatty acids and glycerol, and fatty acids are further converted into acetyl $CoA$ before entering the respiratory pathway.
Similarly, proteins are broken down into amino acids, which enter the respiratory pathway after deamination.
However, during the synthesis of fatty acids, acetyl $CoA$ is withdrawn from the respiratory pathway.
Likewise, during the synthesis of proteins, respiratory intermediates are withdrawn for the synthesis of amino acids.
Since the respiratory pathway is involved in both the breakdown (catabolism) and the synthesis (anabolism) of substrates, it is termed an amphibolic pathway.