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 that
A) stimulate parasympathetic nerves, which return to the bladder and cause it to contract
B) inhibit the motor neurons that normally keep the external urethral sphincter closed
C) stimulate nerves that go to the kidney and prevent glomerular filtration until the bladder is empty
D) stimulate parasympathetic nerves, which return to the bladder and cause it to contract and inhibit the motor neurons that normally keep the external urethral sphincter closed
E) none of these

Question

Quizplus · Accepted Answer

When the bladder wall is distended, the stretch receptors send afferent impulses to the spinal cord. These impulses stimulate parasympathetic nerves, which return to the bladder and cause it to contract. Additionally, the impulses inhibit the motor neurons that normally keep the external urethral sphincter closed, allowing for urine to be released. Therefore, choice D is the best answer. Choices A, C, and E are all incorrect as they do not accurately describe the physiological response to bladder distension.

When the Bladder Wall Is Distended as a Result of Urine