What is the response to parasympathetic stimulation of the bladder wall muscle?

Parasympathetic stimulation of the bladder wall muscle primarily causes contraction of the detrusor muscle, which facilitates bladder emptying. This contraction increases intravesical pressure, promoting the expulsion of urine. Additionally, parasympathetic stimulation inhibits the internal urethral sphincter, allowing urine to flow from the bladder into the urethra. Overall, this response is crucial for the process of micturition (urination).