Final answer:
Voiding is the process of urination. It involves the expulsion of urine from the bladder through a series of coordinated muscle contractions and the relaxation of urethral sphincters, a process that is normally under voluntary control. the correct option is C. urination.
Step-by-step explanation:
Voiding is C. urination. Urination, also known as micturition or voiding, is the process of excreting urine from the urinary bladder through the urethra to the outside of the body. In the phenomenon known as the micturition reflex, the bladder fills to a certain point and then signals the brain that it's time to urinate. At a convenient time, coordinated muscle contractions allow for the expulsion of urine.
This involves relaxation of the internal and external urethral sphincters, as well as the bladder muscles contracting to push urine out. Under normal circumstances, the act of urination is under voluntary control, meaning that an individual can decide when to void. It contrasts with fecal elimination, vomiting, and surgical drainage, which are different forms of bodily waste expulsion and are not associated with the term voiding.