Which of the following is not true of the urethra?
A. The type of epithelium found in the mucous coat changes between the base of the urinary bladder and the external urethral orifice.
B. It contains two sphincters, one composed of smooth muscle, and the other composed of skeletal muscle.
C. It contains urethral glands, which secrete protective mucus into the lumen of the urethra.
D. It is about the same length in males and females.
E. All of these are true of the urethra.
Answer: D
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