Q. 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 messenger to initiate the contraction smooth muscles of bladder and simultaneous relaxation of urethral sphincter The correct order of steps for urination is
A) II$\rightarrow$I$\rightarrow$IV$\rightarrow$III
B) IV$\rightarrow$III$\rightarrow$II$\rightarrow$I
C) II$\rightarrow$I$\rightarrow$III$\rightarrow$IV
D) III$\rightarrow$II$\rightarrow$I$\rightarrow$IV
Explanation
Steps for Urination Bladder fills with urine and becomes distended. Stretch receptors on the wall of urinary bladder send signal to the CNS. CNS posses on motor message to initial messengers to initiate the contraction smooth muscle of bladder and simultaneous relaxation of urethral sphincter causing the release of urine
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.