Question

The micturition reflex

• A. Can be stimulated or inhibited by higher centers in the brain.
• B. Is stimulated by increased pressure in the bladder.
• C. Can be stimulated by irritation of the bladder or urethra.
• D. All of these

Answer 1

The correct option is D

All of these

Micturition is the process of urination, or flow of urine from the bladder through the urethra. When enough urine is accumulated in the bladder, it causes a stretch in the bladder walls. A threshold amount of this stretch causes a signal to be sent to the CNS. The CNS correlates the stretch information to volume of urine present and initiates what is called the micturition reflex. Conversely, an increased pressure in the bladder also stimulates it. It can also be stimulated by irritation of the bladder or urethra.