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30 Cards in this Set
- Front
- Back
The ductus deferens develops from the_____of the embryo.
a. mesonephric duct b. paramesonephric duct c. phallus d. labioscrotal folds e. urogenital folds |
mesonephric duct
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Decent of the testes is achieved by contraction of a cord called
a. the gubernaculum b. the spermatic cord c. the ductus deferens d. the pampiniform plexus e. the rete testis |
the gubernaculum
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The expulsion of semen occurs when the bulbospongiosus muscle is stimulated by
a. somatic efferent neurons b. somatic afferent neurons c. sympathetic efferent neurons d. parasympathetic efferent neurons e. prostaglandins |
somatic efferent neurons
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Prior to ejaculation, sperm are stored primarily in
a. the sminiferous tubules b. the rete testis c. the epididymis d. the sminal vesicles e. the ejaculatory ducts |
the epididymis
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The penis is attached to the pubic arch by crura of
a. the corpora cavernosa b. the corpus spongiosum c. the perineal membrane d. the bulbocavernosus e. the ischiocavernosus |
the corpora cavernosa
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The first hormone secreted at the onset of puberty is
a. follicle-stimulating hormone b. interstitial cell-stimulating hormone c. human chorionic gonadotropin d. gonadotropin releasing hormone e. testosterone |
gonadotropin-releasing hormone
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When is it necessary to reduce sperm production without reducing testosterone secretion, the sustentacular cells secrete
a. dihydrotestosterone b. androgen-binding protein c. LH d. FSH e. inhibin |
inhibin
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Four spermatozoa arise from each
a. primordial germ cell b. type A spermatogonium c. type B spermatogonium d. secondary spermatocyte e. spermatid |
type B spermatogonium
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The point in meiosis at which sister chromatids separate from each other is
a. prophase I b. metaphase I c. anaphase I d. anaphase II e. telophase II |
anaphase II
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Blood is forced out of the penile lacunae by contraction of the______muscles
a. bulbocavernosus b. ischiocavernosus c. cremaster d. trabecular e. dartos |
trabecular
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Under the influence of androgens, the embryonic______duct develops into the male reproductive tract.
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mesonephric
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Spermatozoa obtain energy for locomotion from_____in the semen
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fructose
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The_______, a network of veins in the spermatic cord, helps keep the testes cooler than the core body temperature.
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panpiniform plexus
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All germ cells beginning with the_______are genetically different from the rest of the body cells and therefore must be protected by the blood-testis barrier.
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second spermatocytes
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The corpora cavernosa as well as the testes have a fibrous capsule called the______.
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tunica albuginea
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Over half of the semen consits of secretions from a pair of glands called the______.
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seminal vesicles
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The blood-testis barrier is formed by tight junctions between the________cells.
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sustentacular
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The earliest haploid stage of spermatogenesis is the______.
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secondary spermatocyte
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Erection of the penis occurs when nitric oxide causes the_____arteries to dilate.
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deep
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A sperm penetrates the egg by means of enzymes in its______.
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aerosome
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T/F The male scrotum is homologous to the female labis majora.
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True
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T/F Sperm cannot develop at the core body temperature.
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True
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T/F Luteinizing hormone stimulates the testes to secrete testosterone.
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True
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T/F The testes and penis are the primary sex organs of the male.
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False, only the testes are the primary sex organs
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T/F A high testosterone level makes a fetus develop a male reproductive system, and a high estrogen level makes it develop a female reproductive system.
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False, female development results from a low testosterone level, not from estrogen
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T/F Most of the semen is produced by the seminal vesicles.
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True
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T/F The pampiniform plexus serves to keep the testes warm.
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False, the pampiniform plexus prevents the testes from overheating
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T/F Prior to ejaculation, sperm are stored mainly in the seminal vesicles.
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False, sperm are stored in the epididymis.
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T/F Male menopause is the cessation of sperm production around the age of 55.
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False, no such thing as male menopause
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T/F Erection is caused by parasympathetic stimulation of the penile arteries.
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True
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