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Endothelin ETB Receptors Are Involved in the Relaxation to the Pig Urinary Bladder neck

The involvement of endothelin receptors in the contraction of the lower urinary tract smooth muscle is well established. There is scarce information, however, about endothelin receptors mediating relaxation of the bladder outlet region. The current study investigates the possible existence of endothelin ETB receptors involved in the relaxation of pig bladder neck.