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