Advanced Penis Quiz
Ready to start the quiz?
This quiz contains 10 questions. Click below to begin.
Q1. Which type of endothelial cells regulate penile erection via nitric oxide release?
- Glomerular endothelial cells
- Arterial fibroblasts
- Cavernosal endothelial cells
- Smooth muscle cells
Q2. What is the function of the helicine arteries in the penis?
- Dilate and fill erectile tissue
- Drain venous blood from penis
- Transmit nerve impulses to glans
- Transport lymph from corpus spongiosum
Q3. Which neurotransmitter initiates vasodilation of penile arteries during arousal?
- Serotonin
- Dopamine
- Nitric oxide (NO)
- Norepinephrine
Q4. What is the role of phosphodiesterase type 5 (PDE5) in penile physiology?
- Degrades cGMP to terminate erection
- Inhibits sympathetic output
- Stimulates nitric oxide production
- Enhances testosterone secretion
Q5. Which plexus lies deep to Buck’s fascia and drains the erectile tissues?
- Subcutaneous venous network
- Deep dorsal venous plexus
- Pampiniform plexus
- Superficial dorsal plexus
Q6. What structural role does Buck’s fascia serve in the penis?
- Connects penis to bladder
- Lines the urethral lumen
- Secretes pre-ejaculatory fluid
- Supports and encloses erectile tissues
Q7. Which autonomic fibers are responsible for emission during ejaculation?
- Parasympathetic fibers (S2–S4)
- Sympathetic fibers (T12–L2)
- Cranial nerves IX and X
- Somatic motor fibers
Q8. Which corpus remains pliable during erection to maintain urethral patency?
- Corpus cavernosum
- Tunica albuginea
- Corpus spongiosum
- Urethral meatus
Q9. What causes detumescence following ejaculation?
- Persistent cavernosal dilation
- Continued nitric oxide release
- Sympathetic vasoconstriction and cGMP breakdown
- Venous outflow blockage
Q10. Which anatomical landmark divides the root and body of the penis?
- Deep dorsal vein
- Glans penis
- Corona of glans
- Suspensory ligament