selective inhibition of catecholamine effects by beta-adrenoblocking drug propranolol , obvious potentiation of na effect by caffeine , and compensatory increasing of thermoregulatory musclar contractile activity during the blockade of betaadrenoreceptors under cooling suggest the domineering of betaadrenergic mechanisms of thermogenesis in siberian lemmings and their high thermoregulatory lability .
C0007412
catecholamine
C0028351
na