Summaries of Urinary Bladder Detrusor Muscle in Histology and Physiology

Urinary bladder detrusor muscle has its characteristics in organizational structure,ultrastructure,contraction function,relaxation function,autorhythmicity and electrophysiology.At organizational structure,urinary bladder detrusor muscle forms an unity whole through the intercross aggregation of smooth muscle bundles;At ultrastructure,smooth muscle bundles make an organic combination via the intermediate junction among detrusor muscle cells;At contractibility,the physiological features of urinary bladder detrusor muscle is the dynamic equilibrium between spontaneous muscle contraction and never-controlled muscle contraction;At relaxation of the muscles,the physiological features of urinary bladder detrusor muscle is the coordination or compatibility between muscles stress relaxation and never-controlled muscle relaxation;At autorhythmicity,urinary bladder detrusor muscle possesses the ability of producing spontaneous action potential and initiating spontaneous contraction;At electrophysiology,action potential caused by the depolarization of detrusor muscle cell membrane brings about the coupling between excitation and contraction through making endosmotic Ca~(2+) with calcium channel.