0
Add your answer:
Earn +20 pts
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
Why doesn't semen enter the urinary bladder during ejaculation?
The smooth muscle sphincter at the base of the urinary bladder closes.
What sphincter is at the base of the bladder?
The male urethral sphincter is a striated muscle that is located at the base of the bladder. It runs from the base of the bladder to the perineal membrane.
What muscle present at the tip of the urinary bladder that controls the urine?
bladder sphincter
What Muscle that opens to allow urine to be removed from the bladder?
sphincter
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 )
Is the bladder a voluntary muscle?
The majority of the bladder is made of detrusor muscle. This muscle is told by the nervous system to contract when it expands. This is what causes the feeling of needing to urinate. In order to urinate the involuntary muscle the internal sphincter, and the voluntary muscle the external sphincter must both be opened. The detrusor muscle moves involuntarily, so the bladder would probably considered an involuntary muscle.
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.
What type of muscle tissue is voluntarily controlled?
Generally, skeletal muscle is voluntarily controlled and smooth muscle is not. Some structures have a combination of both. For example, the bladder is made up of smooth muscle and consists of some skeletal muscle at the sphincter which is capable of "holding" it until you are ready.
What is a ring of skeletal muscle that regulates the movement of a bolus into the esophagus?
The ring of skeletal muscle that regulates the movement of a bolus into the esophagus is called the upper esophageal sphincter (UES). The UES opens to allow the passage of food and liquid into the esophagus during swallowing and then closes to prevent aspiration into the trachea.
What closes like a rubber band around the opening of the bladder?
The sphincter muscle closes like a rubber band around the opening of the bladder to prevent urine from leaking out. This muscle is controlled by nerves and can be consciously relaxed or contracted to release or hold urine in the bladder.
Does urethra have valves?
No the bladder has a sphincter muscle to control flow but past that is clear sailing.
