Which of the following male accessory reproductive organs secretes prostaglandins?
A. prostate gland
B. seminal vesicles
C. epididymis
D. bulbourethral glands
E. vas deferens
(
Question 2) As sperm travel from their site of production in the testes to the exterior, the sequence of ducts through which they will pass is:
A. rete testis; efferent ductules; vas deferens; ejaculatory duct; urethra.
B. efferent ductules; rete testis; vas deferens; ejaculatory duct; urethra.
C. rete testis; efferent ductules; vas deferens; urethra; ejaculatory duct.
D. rete testis; afferent ductules; ejaculatory duct; vas deferens; urethra.
E. rete testis; ejaculatory duct; efferent ductules; vas deferens; urethra.
(
Question 3) Which of the following would be most likely to occur in an adult male whose Sertoli cells have begun to produce excessive amounts of inhibin?
A. FSH secretion would be selectively inhibited, but LH secretion would be normal.
B. Spermatogenesis would be increased but testosterone secretion would be normal.
C. Spermatogenesis would be increased because testosterone production would be above normal.
D. Gonadotropin-releasing hormone levels and spermatogenesis would increase above normal.
E. Both FSH and LH secretion would rise above normal levels.
(
Question 4) Which of the following is FALSE regarding erection of the penis?
A. It is a spinal reflex.
B. It is a result of sympathetic stimulation of vascular smooth muscle in the erectile tissue of the penis.
C. It can be triggered by stimulation of tactile receptors in the penis.
D. It is a result of arteriolar vasodilation and venous constriction of blood vessels in the penis.
E. It can be inhibited by input to the autonomic nerves from higher brain centers.
(
Question 5) Ejaculation of semen from the penis is caused by:
A. a parasympathetic reflex that contracts the seminal vesicles, epididymis, and vas deferens.
B. a somatic reflex that initiates sperm production and motility, and contracts skeletal muscle surrounding the vas deferens.
C. voluntary relaxation of the internal urethral sphincter, and sympathetic stimulation of smooth muscle contraction in the walls of the ureters and the urethra.
D. sympathetic nerve firing, which initiates smooth muscle contraction in the epididymis, vas deferens, ejaculatory ducts, prostate, and seminal vesicles.
E. parasympathetic stimulation of smooth muscle in the ureters, urinary bladder, and urethra.
(
Question 6) The process of spermatogenesis from primary spermatocyte to sperm:
A. takes about three weeks in the human.
B. occurs when a male is an embryo, ceasing at birth.
C. requires participation of Sertoli cells.
D. occurs in the epididymis.
E. occurs as the cells gradually travel between two closely attached Leydig cells.
(
Question 7) Which is NOT a function of Sertoli cells?
A. forming a barrier between the blood and developing germ cells
B. secreting inhibin
C. nourishing developing sperm
D. converting estrogens into testosterone
E. phagocytizing defective sperm
(
Question 8) Which of the following statements regarding male reproductive function is FALSE?
A. Sperm formed in the testes enter the epididymis before entering the vas deferens.
B. The seminal fluid is alkaline and rich in nutrients.
C. The Sertoli cells produce androgen-binding protein.
D. Sperm entering the epididymis are fully motile.
E. Most of the seminal volume is provided by the secretions of the seminal vesicles and prostate gland.
(
Question 9) Sperm:
A. are stored in the vas deferens and the last part of the epididymis.
B. travel from the seminiferous tubules to the epididymis by the beating action of their flagellae.
C. travel through the vas deferens, then the ejaculatory duct, then the ureter during ejaculation.
D. are expelled from the penis through the ureter.
E. are no longer produced in individuals who have undergone a vasectomy.
(
Question 10) The androgen-binding protein functions to:
A. confer responsiveness of certain cells to male sex hormones.
B. transport androgens in the plasma.
C. bind and maintain high concentrations of testosterone in the seminiferous tubules.
D. transport testosterone across cell walls.
E. exert negative feedback on the production of testosterone by the Leydig cells.
Quick Reply
