the pre-treatment with a non-selective beta adrenoceptor blocker ( propranolol ) canceled all the isoxsuprine-dependent changes , while the pre-treatment with a selective beta adrenoceptor blocker ( metoprolol ) abolished only tachycardia and did not influence the increase of calf blood flow and the decrease of blood viscosity .
C0034783
adrenoceptor
C0001643
beta adrenoceptor