Question

The opening of urethra is controlled by

a) Sphincter muscle

b) Cardiac muscle

c) Calf muscle

d) Biceps muscle

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Answer 1

Explanation:

a) Sphincter muscle

The internal urethral sphincter regulates involuntary control of urine flow from the bladder to the urethra, and the external urethral sphincter provides voluntary control of urine flow from the bladder to the urethra.