effects of thyroxine ( t4 ) , triiodothyronine ( t3 ) or reverse-triiodothyronine ( rt3 ) in vivo pretreatment or the effect of hypothyroidism on properties of beta-adrenoreceptors in the rat heart were investigated . beta-adrenergic antagonist hydroxybenzylpindolol ( hyp125i ) was used to estimate the maximal binding capacity ( mbc ) and the affinity ( kd ) of beta-adrenoreceptors .
C0040165
thyroxine
C0020676
hypothyroidism