CHOLESTEROL CONCENTRATION IN ADRENAL GLANDS 



223 



lethal dose (850 r) of X-rays was studied. The exposure to X-rays produced a 

 highly significant drop in cholesterol in the majority of the glands demons- 



Table II 



trating a stimulating effect on the part of the pituitary grafts upon the 

 functional activity of the adrenal glands (Table III). 



Eecent histological and histochemical studies on the hypothalamus 

 presuppose and endocrine activity by the neurones of the nuclei of the 



Table III 



hypothalamus, the function of which has been linked with the secretory 

 activity of the anterior lobe of the pituitary. The evidence so far obtained has 

 served to place the anterior pituitary in the same dependent position in 

 respect to the hypothalamus as some other glands with internal secretion in 

 their relation to the anterior pituitary. 



