injections of triiodothyronine ( t ( 3 ) ) and thyroxine ( t ( 4 ) ) into chronically hypothyroid rats were used to evaluate the contribution of intracellular t ( 4 ) to t ( 3 ) conversion to nuclear t ( 3 ) in pituitary , liver , and kidney , and to correlate the occupancy of pituitary nuclear t ( 3 ) receptors with inhibition of thyroid-stimulating hormone ( tsh ) release .
C0020676
hypothyroid
C0041014
t ( 3