Micturition MCQ Quiz | Kidney

Welcome to this specialized quiz on Micturition, a critical topic in renal physiology for MBBS students. This quiz is designed to test your understanding of the complex neural control and muscular mechanics involved in the storage and voiding of urine. Covering everything from the micturition reflex, the roles of sympathetic, parasympathetic, and somatic nervous systems, to clinical conditions like atonic and automatic bladders, these 25 questions will challenge and reinforce your knowledge. Carefully evaluate each option before making your choice. After submitting your answers, you’ll receive a detailed score report. For your revision, you can also download a PDF file containing all the questions along with their correct answers. Good luck!

1. The primary muscle responsible for the contraction of the urinary bladder wall during micturition is the:

2. The micturition reflex is initiated by the stimulation of which receptors in the bladder wall?

3. During the filling phase of the bladder, which part of the nervous system is predominantly active to promote urine storage?

4. Voluntary control over micturition is primarily exerted through which structure?

5. The main coordinating center for micturition located in the brainstem is the:

6. Parasympathetic stimulation of the bladder leads to:

7. Which nerve provides somatic motor innervation to the external urethral sphincter?

8. A patient with a complete transection of the spinal cord above the sacral region would likely develop which type of bladder dysfunction after the phase of spinal shock?

9. The phenomenon of “overflow incontinence” is characteristic of:

10. At which approximate bladder volume is the first urge to void typically felt in a healthy adult?

11. A cystometrogram is a diagnostic tool used to measure the relationship between:

12. Destruction of sensory nerve fibers from the bladder to the spinal cord would result in:

13. The internal urethral sphincter is composed of what type of muscle tissue?

14. Which neurotransmitter and receptor combination is primarily responsible for the contraction of the detrusor muscle during micturition?

15. The ability of the bladder to maintain a relatively low intravesical pressure during filling is known as:

16. The “guarding reflex” refers to the process where:

17. An uninhibited neurogenic bladder, characterized by frequent and relatively uncontrolled micturition, is often caused by damage to:

18. The triangular area on the posterior wall of the bladder between the openings of the ureters and the urethra is called the:

19. Administration of an anticholinergic drug like atropine would be expected to cause:

20. The uretero-renal reflex is a sympathomimetic reflex that causes:

21. Sensory afferent signals from the bladder wall travel to the spinal cord primarily via the:

22. Which of the following best describes the role of the cerebral cortex in micturition?

23. In the micturition reflex, the parasympathetic postganglionic neurons release acetylcholine, but they may also release which other substance to help relax the bladder neck and urethra?

24. Sympathetic innervation to the bladder neck and internal sphincter originates from which spinal cord segments?

25. What is micturition syncope?