STANDARD Zoology Micturition MCQ Question
The outline of principal event of urination is given below in unorder manner I. Stretch receptors on the wall of urinary bladder send signal to the CNS II. The bladder fills with urine and becomes distended III. Micturition IV. CNS passes on motor messages to initiate the contraction of smooth muscles of bladder and simultaneous relaxation of urethral sphincter. The correct order of steps for urination is
II → I → IV → III
IV → III → II → I
II → I → III → IV
III → II → I → IV
Correct Answer
Detailed Explanation
The correct sequence involves the bladder filling with urine (II), sending signals to the CNS (I), which then sends motor messages to contract the bladder muscles and relax the sphincter (IV), leading to micturition (III).
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