Multiple choice Which part of the male reproductive system lubricates and neutralises urethra? Epididymis Ductus deferens Seminal vesicles Cowper’s glands Prostate gland Reveal answer Fill a bubble to check yourself D Correct answer Explanation Cowper’s glands secrete a thin alkaline fluid into the urethra that lubricates the urethra and neutralises acid from urine remaining in the urethra after urination.