Which of the following acts as the trigger for the initiation of micturition (voiding)?
A) the stretching of the bladder wall
B) motor neurons
C) the pressure of the fluid in the bladder
D) the sympathetic efferents

Question

Quizplus · Accepted Answer

The stretching of the bladder wall triggers the micturition (voiding) reflex, which signals the spinal cord to send motor neurons to the bladder and internal sphincter to contract while the external sphincter relaxes, allowing for urine to flow out of the body. The pressure of the fluid in the bladder and sympathetic efferents can also have an effect on micturition, but they are not the primary trigger for its initiation.

Which of the Following Acts as the Trigger for the Initiation