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Q: Is the external urethral sphincter under voluntary control?
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Where is the external urethral sphincter located?

The external urethral sphincter is located around the urethra, which is the tube that carries urine from the bladder to outside the body. It is a voluntary muscle, meaning you have control over when you relax or contract it to release or hold urine.


Which nerve supplies the pelvic floor?

The pudendal nerve (part of the somatic nervous system, voluntary control) innervates the pelvic floor. It also innervates the external urethral sphincter; the internal urethral sphincter is innervated by the pelvic nerve (part of the parasympathetic nervous system, involuntary control).


The internal urethral sphincter is composed of skeletal muscle whereas the external urethral sphincter the lower sphincter is composed of smooth muscle and thus is under involuntary control?

it is the opposite. The internal sphincter is composed of smooth muscles while the external one is composed of skeletal muscles


Which sphincter allows for defecation and is under voluntary control?

The external anal sphincter is under voluntary control. You have the urge to defecate because your internal anal sphincter involuntarily opens, but you can keep yourself from going to the bathroom because your external anal sphincter is voluntarily closed. Hope that helps!


What are the parts of Anus?

The anus is composed of two sphincter muscles: the inner sphincter, which is involuntary, and the external sphincter, which is under voluntary control.


Is your bladder a muscle?

Urinary bladder mainly contains two types of musces 1. Smooth muscles, forming the wall of the bladder ( Detrusor muscle ) and the internal urethral sphincter ( which controls the flow of urine which is involuntary ), and 2. Skeletal muscle, which forms the external urethral sphicter with which we can control the flow of urine.. ( voluntary control of flow )


Control of the voluntary urethral sphincter in normal children is related to?

Control of the voluntary urethral sphincter in normal children is related to the development of the central nervous system, particularly the maturation of the neural pathways involved in bladder control. It also depends on the child's ability to sense and respond to signals of a full bladder. Training through toilet learning and practice also plays a crucial role in achieving continence.


Are there 2 anal sphincter muscles?

Yes, there are two anal sphincter muscles: the internal anal sphincter, which is made of smooth muscle and is under involuntary control, and the external anal sphincter, which is made of skeletal muscle and is under voluntary control.


How does the urinary sphincter work?

The urethral sphincter is broken down into two separate muscles, the internal and external sphincter muscles of the urethra. The internal muscle is located where the urethra joins the bladder. It is under involuntary control and works by balancing the sympathetic (keeping closed) and parasympathetic (opening) nervous systems. The second muscle is located just after the prostate gland. It is under voluntary control and works by the somatic nervous system.


What receptors are stimulated in the micturition reflex?

Stretch receptors in the bladder wall are stimulated during bladder filling, sending signals to the spinal cord. Parasympathetic nerve fibers release acetylcholine to contract the detrusor muscle and relax the internal urethral sphincter. Sympathetic fibers release norepinephrine to contract the external urethral sphincter, allowing for voluntary control.


What parts make up the anus?

The anus is made up of two sphincter muscles: the internal anal sphincter, which is involuntary, and the external anal sphincter, which is under voluntary control. The anus also contains sensitive nerve endings that detect the passage of stool.


Where is the internal urethral spinchter located?

The internal urethral sphincter is a smooth muscle located at the neck of the urinary bladder and surrounds the opening of the urethra. It helps in controlling the flow of urine from the bladder to the urethra.