Question

Which all of these are involved in control of urination?

• A. Voluntary muscles
• B. Involuntary muscles
• C. Hormones
• D. Enzymes

Answer 1

Answer: (A), (B)

The correct options are
A Voluntary muscles
B Involuntary muscles

Urethral sphincters are muscular mechanisms that controls the release and retention of urine from the bladder. There are mainly two urethral sphincters, the internal and external urinary sphincters. The internal urethral sphincter prevents urine from leaving the bladder to enter the urethra. This sphincter is under involuntary control of the brain. External urethral sphincter provides a means of stopping the escape of urine from the body.