What is the urination results from an involuntary and voluntary process called?

The urination results from both involuntary and voluntary processes are collectively referred to as micturition. Involuntarily, the bladder fills and stretches, triggering signals to the brain that create the urge to urinate. Voluntarily, an individual can choose to initiate urination by relaxing the external urethral sphincter. This coordinated effort between the nervous system and muscle control allows for the regulation of urine flow.