<prompt> Which does not cause relaxation of urinary bladder ?Sympathetic StimulationMuscarinic receptorsBeta receptorsNone of the above  <response>: Ans. isbi.e., Muscarinic receptorsSympathetic stimulation causes relaxation of bladder detrusor muscle beta-2 adrenoreceptors.Parasympathetic stimulation cause contraction of bladder detrusor muscle muscarinic M3 receptors. 