When the bladder wall is distended as a result of urine accumulation, the stretch receptors are stimulated and send afferent impulses to the spinal cord. Which of the following statements does NOT describe the afferent impulses?
A)They stimulate parasympathetic nerves, which return to the bladder and cause it to contract.
B)They inhibit the motor neurons that normally keep the external urethral sphincter closed.
C) They stimulate nerves that go to the kidney and prevent glomerular filtration until the bladder is empty.
D) They stimulate parasympathetic nerves, and cause the internal urethral sphincter to mechanically open.

Question

Quizplus · Accepted Answer

The afferent impulses from stretch receptors in the bladder wall do not stimulate nerves that go to the kidney and prevent glomerular filtration. Instead, they stimulate the micturition reflex (bladder emptying reflex) that leads to the contraction of bladder smooth muscles and relaxation of the internal urethral sphincter. This allows for urine to flow out of the bladder and through the urethra for elimination.

When the Bladder Wall Is Distended as a Result of Urine