sympathin in English
noun
hormonal substance secreted by the sympathetic nervous system (Physiology)
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1. The receptor with the first rank order (for example for blood vessel contraction) he called alpha adrenotropic receptor (now α-adrenoceptor or α-adrenergic receptor), while the receptor with the second rank order (for instance for stimulation of the heart, but also for bronchodilation) he called beta adrenotropic receptor (now β-adrenoceptor or β-adrenergic receptor). ′′This concept of two fundamental types of receptors is directly opposed to the concept of two mediator substances (sympathin E and sympathin I) as propounded by Cannon and Rosenblueth and now widely quoted as ‘law’ of physiology. ...