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What causes the internal urethral sphincter to open?
The internal urethral sphincter opens in response to signals from the autonomic nervous system, particularly the parasympathetic nervous system. This relaxation allows urine to flow from the bladder into the urethra for expulsion.
The bundles of interlaced muscular fibers in the wall of the urinary bladder comprise the?
The bundles of interlaced muscular fibers in the wall of the urinary bladder comprise the internal urethral sphincter. The contraction of the internal urethral sphincter prevent the bladder from emptying until the urinary pressure reaches a certain level.
Is the micturition reflex center is located in the pons?
No, the micturition reflex center is located in the sacral region of the spinal cord, specifically at the level of the S2 to S4 segments. This center regulates the process of urination, including the contraction of the bladder and relaxation of the internal urethral sphincter.
What is the superior upper portion of the male urethra encircled by?
The superior upper portion of the male urethra is encircled by the internal urethral sphincter, which is a smooth muscle that helps control the flow of urine from the bladder into the urethra.
Which term refers to the external opening of the urethra?
The opening of the urethra is the external urethral orifice.
What keeps the urethra closed when urine is not being passed?
internal urethral sphincter
What happens for micturition to occur?
1) The detrusor muscle must contract 2) The internal urethral sphincter must open 3)The external urethral sphincter must open
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
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.
What causes the internal urethral sphincter to open?
The internal urethral sphincter opens in response to signals from the autonomic nervous system, particularly the parasympathetic nervous system. This relaxation allows urine to flow from the bladder into the urethra for expulsion.
What is being born with the opening of the urethra on the upper surface of the peniis?
Epispadias - is a congenital abnormality of the urethral opening. In the male with epispadias, the urethral opening is located on the upper surface of the penis. In the female with epispadias, the urethral opening is in the region of the clitoris.
How does the muscle of the internal anal sphincter differ from that of the external anal sphincter?
The internal urethral sphincter an involuntary sphincter that keeps the urethra closed when urine is not being used. The external urethral sphincter is fashioned by skeletal muscles as the urethra passes thorugh the pelvic floor.This sphincter is voluntary controlled.
The bundles of interlaced muscular fibers in the wall of the urinary bladder comprise the?
The bundles of interlaced muscular fibers in the wall of the urinary bladder comprise the internal urethral sphincter. The contraction of the internal urethral sphincter prevent the bladder from emptying until the urinary pressure reaches a certain level.
Where is the trigone area located?
system in the body that the trigone remainsBladder
Is the micturition reflex center is located in the pons?
No, the micturition reflex center is located in the sacral region of the spinal cord, specifically at the level of the S2 to S4 segments. This center regulates the process of urination, including the contraction of the bladder and relaxation of the internal urethral sphincter.
How do zebras defecate?
Just like horses or donkeys. Lift tail, relax spinchter, push.
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.
