Does The Sympathetic Nervous System Increase or Decrease Urination?
The sympathetic nervous system plays a role in regulating many bodily functions, including urination.
Under normal conditions, the sympathetic nervous system inhibits urination and reduces the production of urine. It achieves this by activating the alpha-adrenergic receptors in the smooth muscles of the bladder and urethra.
When the sympathetic nervous system is activated, the bladder sphincter contracts, preventing urine from being released, and the detrusor muscle (the muscle responsible for bladder contraction) relaxes, reducing the urgency to urinate.
This response is part of the “fight-or-flight” response triggered by the sympathetic nervous system during moments of stress or threat. In these situations, the body prioritizes other functions over non-essential activities such as urination and digestion.
So, in summary, the sympathetic nervous system decreases urination by constricting the bladder sphincter and relaxing the detrusor muscle.
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