44 Physiology MCQs Answer
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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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