ICSE BoardEnglish MediumSTD 10BiologyThe Excretory system1 Mark
MCQ
The muscle which controls urination is:
A
Circular muscle
✓
Sphincter muscle
C
Smooth muscle
D
Both (a) and (b)
✓
Answer
Correct option: B.
Sphincter muscle
(b) Sphincter muscle Explanation: Urination is controlled by the sphincter muscles, which include the internal and external urethral sphincters. These muscles relax to allow urine to flow out of the bladder.
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