Question:
Urethral internal sphincter present between urinary bladder and urethra is made up of _________ muscles and is _________ in nature.
Urethral internal sphincter present between urinary bladder and urethra is made up of _________ muscles and is _________ in nature.
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The internal sphincter is smooth muscle and is involuntary.
Updated On: Nov 12, 2026
- skeletal and involuntary
- smooth and involuntary
- skeletal and voluntary
- smooth and voluntary
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Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
The urinary bladder has two sphincters at its outlet.
Step 2: Internal sphincter
It lies at the bladder-urethra junction and is formed from smooth muscle. It is not under conscious control, so it is involuntary.
Step 3: External sphincter
The external sphincter is skeletal and voluntary, which lets us hold back urine.
Final Answer:
The internal sphincter is smooth and involuntary. \[ \boxed{\text{(B) }\text{smooth and involuntary}} \]
The urinary bladder has two sphincters at its outlet.
Step 2: Internal sphincter
It lies at the bladder-urethra junction and is formed from smooth muscle. It is not under conscious control, so it is involuntary.
Step 3: External sphincter
The external sphincter is skeletal and voluntary, which lets us hold back urine.
Final Answer:
The internal sphincter is smooth and involuntary. \[ \boxed{\text{(B) }\text{smooth and involuntary}} \]
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