I. Neuronal Adrenoceptors in Cardiovascular Regulation.- Involvement of Catecholaminergic Neurones of the Hypothalamus in Blood Pressure Regulation.- On the Mechanism and Scope of Adrenoceptor-Mediated Control of Sympathetic Neuro-Effector Transmission: A Model Study.- Presynaptic ?-Adrenoceptor Control of Transmitter Release from Vascular Sympathetic Neurones in Vitro.- Presynaptic ?-Adrenoceptors in Human Blood Vessels and Their Possible Relationship to Adenylate Cyclase.- In Vivo Operation of Prejunctional Adrenoceptors in the Peripheral Sympathetic Nervous System.- Transmitter Coexistence in the Sympathetic Nervous System: Impact on Cardiovascular Regulation.- II. Adrenoceptors of the Cardiovascular Musculature.- Adrenoceptors in the Myocardium: Mechanical and Biochemical Events Resulting from Their Stimulation.- Regulation of Myocardial Contractility Via Adrenoceptors: Differential Mechanisms of ?- and ?-Adrenoceptor-Mediated Actions.- The Functional Role of the Coexistence of ?1- and ?2-Adrenoceptors in the Human Heart.- Effect of Thyroid Hormones on Myocardial Adrenoceptors and Adrenoceptor-Mediated Cardiovascular Responses in the Rat.- Postsynaptic ?-Adrenoceptors in Blood Vessels: Discrepancies Between Results Obtained In Vivo and In Vitro.- Adrenaline Reversal and Postjunctional ?-Adrenoceptors.