Advanced Penile Urethra Quiz

Q1. Why is the external urethral orifice clinically important during instrumentation?

• It contains the internal urethral sphincter
• It is surrounded by the prostate
• It opens into the urinary bladder
• It is a naturally narrow part of the male urethra

Q2. Which anatomical feature allows the penile urethra to remain open during erection?

• Complete collapse of the corpus spongiosum
• Lower rigidity of the surrounding corpus spongiosum
• Contraction of the ureters
• Closure of the external urethral orifice

Q3. Why can urethral injury in the spongy portion cause urine to enter superficial perineal spaces?

• The corpora cavernosa drain urine
• Urine normally flows through lymphatic vessels
• Urine can track through continuous superficial fascial planes
• The urethra opens directly into the peritoneal cavity

Q4. Which fascial continuity helps explain spread of extravasated urine from the superficial perineal space?

• Continuity of pleura and pericardium
• Continuity of dura and periosteum
• Continuity of Colles, dartos, and Scarpa fascia
• Continuity of renal and splenic capsules

Q5. Why does urine from a typical spongy urethral rupture not freely spread into the thigh?

• The femoral artery blocks all fluid
• Superficial fascia attaches to fascia lata near the inguinal region
• The urethra is directly attached to the femur
• The thigh contains no fascial spaces

Q6. What is the relationship between the fossa navicularis and the external urethral orifice?

• The fossa is distal to the external opening
• The fossa is a dilation proximal to the external urethral orifice
• The fossa lies inside the urinary bladder
• The fossa is part of the ductus deferens

Q7. Why are urethral glands clinically relevant?

• Their ducts communicate with the urethral lumen
• They form the external urethral sphincter
• They drain urine from the kidneys
• They produce sperm by meiosis

Q8. Which arterial branches contribute to the blood supply of the spongy urethra?

• Middle cerebral artery branches
• Branches of the internal pudendal artery
• Renal artery branches only
• Superior mesenteric artery branches

Q9. Why can urethral stricture significantly affect urinary flow?

• It causes the ureters to become arteries
• It increases urine production by the kidneys
• It prevents bladder innervation
• A narrowed lumen increases resistance to urinary flow

Q10. Which statement best integrates penile urethral anatomy?

• A distal urethral passage within corpus spongiosum that conveys urine and semen to the exterior
• A duct connecting the testis directly to the bladder
• A paired erectile body forming the penile crura
• A superficial inguinal lymphatic channel