Nervous control of urination involves what mechanism(s)?
A)The brain determines need for urination from an internal clock.
B)Stretch receptors in the urinary bladder directly send impulses to the sphincters to cause urination.
C)Stretch receptors in the urinary bladder send impulses to the spine,causing a urinary reflex,but the brain can delay the reflex.
D)Stretch receptors in the urinary bladder directly send impulses to the brain that consciously decides to stimulate sphincters to relax.
E)Chemical receptors in the bladder detect urine concentration and trigger a reflex action.

Question

Quizplus · Accepted Answer

Stretch receptors in the urinary bladder send impulses to the spine, causing a urinary reflex, but the brain can delay the reflex. This mechanism is known as the micturition reflex. When the bladder stretches to a certain point, signals from the stretch receptors travel to the spinal cord, triggering a reflex that causes the bladder to contract and the urinary sphincter to relax, allowing urine to be released. However, the brain can delay this reflex until it is socially appropriate or convenient to urinate.

Nervous Control of Urination Involves What Mechanism(s)