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NEET UG BIOLOGY MCQ: EXCRETORY PRODUCTS AND THEIR ELIMINATION

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The outline of principal event of urination is given below in unorder manne :  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 messenger to initiate the contraction smooth muscles of bladder and simultaneous relaxation of urethral sphincter. The correct order of steps for urination is

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Correct option: A

II→I→IV→III

Option A (II→I→IV→III) is correct because it represents the correct sequence of events in urination: bladder fills, stretch receptors send signals, CNS initiates contraction and relaxation, and finally, micturition occurs.

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