Stimulation by __________Blank motor impulses causes the detrusor muscle to contract rhythmically.Multiple Choicesomaticparasympatheticsympathetic

The correct answer is parasympathetic.

Explanation

The detrusor muscle, which is the smooth muscle of the bladder wall, is primarily under the control of the autonomic nervous system. Specifically, stimulation by parasympathetic motor impulses leads to the contraction of the detrusor muscle.

1. Somatic Nervous System: This system typically controls voluntary movements through skeletal muscles. It does not directly influence the detrusor muscle.

2. Sympathetic Nervous System: While this system can inhibit bladder contraction and facilitate bladder relaxation, it is not responsible for the rhythmic contractions of the detrusor muscle itself.

3. Parasympathetic Nervous System: This system releases neurotransmitters such as acetylcholine, which bind to receptors on the detrusor muscle, causing it to contract. This contraction is essential for bladder emptying and is an involuntary reflex.

In summary, the parasympathetic division of the autonomic nervous system is crucial for bladder function, particularly in facilitating the rhythmic contractions of the detrusor muscle, which aid in urinary storage and release.