INFLUENCE OF THE DUCTLESS GLANDS 157 



in hyper-thyroidism and retarded in hypo-thyroid- 

 ism. It has already been shown how the pan- 

 creas, the adrenals and probably the thyroid, di- 

 rectly influence carbohydrate metabolism. In pro- 

 tein metabolism in the assimilation and general 

 utilization of meat, proteins of milk and eggs, for 

 example we have reasons to believe that the thy- 

 roid, pituitary, adrenals and the sexual glands 

 stimulate, and the pancreas and the parathyroids 

 inhibit such metabolism. That metabolic studies 

 are of great value in the diagnosis of ductless glan- 

 dular diseases is well illustrated in diseases con- 

 nected with the thyroid (see p. 40). 



