Characterization of the Adrenergic Beta‐Receptor in the Urinary Bladder of Man and Cat

Abstract
The corpus‐fundus of the urinary bladder of man and cat was studied in vitro with respect to type of beta‐adrenergic receptors. In both species beta‐adrenergic stimulation produced marked relaxation but species differences were apparent. In the cat bladder only beta1 receptors were found. In the human bladder the beta‐receptors had neither beta1‐ nor beta2‐characteristics. It is suggested that the beta‐adrenergic receptors in the corpus‐fundus of the human bladder are of a third type.