What is the function of the urethral sphincter in the release of urine?

What is the function of the urethral sphincter in the release of urine?
  1. It contracts to prevent the release of urine
  2. It contracts to increase the release of urine
  3. It relaxes to prevent the release of urine
  4. It relaxes to increase the release of urine

Solution

The urethral sphincter relaxes during the release of urine to allow the urine to flow out of the bladder.

Asked in: NCERT

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