Hall: Guyton and Hall Textbook of Medical Physiology, 12th Edition
Chapter 80: Reproductive and Hormonal Functions of the Male (and Function of the
Pineal Gland)
Test Bank
1. Which of the following cell types produce testosterone in the male?
A. Sertoli cells
B. Glomerulosa cells
C. Leydig cells
D. Thecal cells
Questions 2-4: A 51-year-old male presented to his physician with a complaint of difficulty
maintaining an erection during sexual intercourse. During the history and physical, he said
he had been a diabetic since he was eight years old. He had some problems with retinopathy
previously, and he was taking an angiotensin-converting enzyme inhibitor, a statin and
insulin injections daily. He has six children, ages 7 – 22 years. His heart and lung sounds
were within normal limits. His EKG showed normal sinus rhythm with a rate of 75 bpm.
His laboratory studies included blood sugar 120 mg/dL, BUN 16 mg/dL, serum creatinine
0.6 mg/dL, cholesterol 180 mg/dL, hematocrit 49%, Hgb A1c 7. His urine was positive for
microalbuminuria, negative for glucose.
2. It is likely that this individual is suffering from which condition?
A. Cryptorchidism
B. Erectile dysfunction
C. Premature ejaculation
D. Hyperandrogenism
3. A possible cause for his condition is which of the following?
A. Old age
B. Medications
C. Hypercholesterolemia
D. Retinopathy
4. What treatment would you recommend for this individual?
A. An androgen receptor antagonist
B. A 5-reductase inhibitor
C. Androgen therapy
D. A phosphodiesterase-5 inhibitor
Test Bank
80-2
5. What system controls penile erection in the male?
A. The sympathetic nervous system
B. The parasympathetic nervous system
C. The central nervous system
D. The peripheral nervous system
6. The anatomical structure of the spermatozoon that is important in producing enzymes
that hydrolyze the zona pellucida for fertilization is:
A. Centriole
B. Flagellum
C. Acrosome
D. Corona radiata
7. When in spermatogenesis and/or oogenesis does “crossing over” of the chromosomes
occur?
A. During mitosis
B. During meiosis I
C. During meiosis II
D. Upon fertilization
8. A man is taking a medication that interferes with the emission phase of the sexual act.
Which of the following would solve this problem?
A. A sympathetic nervous system transmitter blocker
B. Viagra, which prolongs the duration of action of nitric oxide
C. A drug which increases release of nitric oxide
D. None of the above
9. The life span of a sperm in the woman’s reproductive tract is:
A. One hour
B. One to two days
C. 4 hours
D. 72 hours
10. The purpose of the prostate gland is:
A. To secrete testosterone
B. To secrete fluid containing calcium and citrate to add to ejaculate
C. To secrete dihydrotestosterone
D. To secrete fluid containing sperm into ejaculate
11. The phosphodiesterase (PDE) 5 inhibitors aid in male impotence by what mechanism?
A. Protecting nitric oxide from being broken down
B. Protecting cGMP from being broken down
C. Protecting L-arginine from being broken down
D. Protecting citrulline from being broken down
12. Inhibin is important in control of:
A. Estradiol secretion
B. Progesterone secretion
C. Follicular-stimulating hormone secretion
D. Luteinizing hormone secretion