Which of these statements about sphincters of urethra is CORRECT?

Question

Which of these statements about sphincters of urethra is CORRECT? (A) Internal urethral sphincter is made up of smooth muscles while external urethral sphincter is made up of striated muscles. (B) Internal urethral sphincter is made up of striated muscles while external urethral sphincter is made up of smooth muscles. (C) Both internal and external urethral sphincter is made up of smooth muscles. (D) Both internali and external urethral sphincter is made up of striated muscles.

Tardigrade Admin · Accepted Answer

The human excretory system consists of a pair of kidneys, a pair of ureters, urinary bladder, and urethra. The urethra is the opening through which urine gets released out of the body. It is of different lengths in males and females. It is around 20 cm in males and 4 cm in females. It shows the presence of two sphincters that control the flow of urine. These are internal and external sphincters (sphincters are openings made up of circular muscles). The internal sphincter is involuntary as it is made up of smooth muscles while external sphincters are voluntary as it is made up of skeletal muscles.

Q. Which of these statements about sphincters of urethra is CORRECT?

Internal urethral sphincter is made up of smooth muscles while external urethral sphincter is made up of striated muscles.

Internal urethral sphincter is made up of striated muscles while external urethral sphincter is made up of smooth muscles.

Both internal and external urethral sphincter is made up of smooth muscles.

Both internali and external urethral sphincter is made up of striated muscles.