Question
Medium
Solving time: 3 mins
The outline of principal event of urination is given below in unordered 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
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The process of urination involves the following steps: -
- Filling of the urinary bladder with the urine and after filling, the bladder becomes distended.
- The filled bladder stretches the receptors present on its wall and sends signals to the CNS.
- After receiving the signal the CNS passes the signal to initiate the contraction of smooth muscles of the bladder and simultaneous relaxation of the urethral sphincter.
- Ultimately the contraction of detrusor muscles of the urinary bladder and relaxation of the sphincter causes Micturition.
Hence, the correct option is A.
- Filling of the urinary bladder with the urine and after filling, the bladder becomes distended.
- The filled bladder stretches the receptors present on its wall and sends signals to the CNS.
- After receiving the signal the CNS passes the signal to initiate the contraction of smooth muscles of the bladder and simultaneous relaxation of the urethral sphincter.
- Ultimately the contraction of detrusor muscles of the urinary bladder and relaxation of the sphincter causes Micturition.
Hence, the correct option is A.
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| Question Text | The outline of principal event of urination is given below in unordered 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 |
| Topic | Excretory Products and their Elimination |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 |
| Upvotes | 117 |
