44 Physiology MCQs Answer

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The Correct Answer is D

Micturition (voiding or urination): act of emptying bladder

  • when ~ 200 ml or urine has accumulated in bladder, contractions of bladder due to activation of stretch receptors & spinal reflexes in turn activates voiding reflexes
  • the micturition center of the pons signals parasympathetic neurons that stimulate contraction of the detrusor muscle & relaxation of the internal & external sphincters, allowing urine expulsion
  • voluntary control of the external sphincter allows urine retention

Category: Physiology MCQs

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