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8 | | Which of the following cells are diploid? |
| | A) | secondary oocytes |
| | B) | secondary spermatocytes |
| | C) | primary spermatocytes |
| | D) | spermatids |
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9 | | Final maturation of sperm cells occurs in the |
| | A) | epididymis |
| | B) | seminiferous tubules |
| | C) | prostate gland. |
| | D) | urethra |
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10 | | Seminal vesicles produce |
| | A) | sperm cells. |
| | B) | testosterone. |
| | C) | fructose-rich fluid. |
| | D) | estrogen. |
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11 | | The normal number of spermatozoa per milliliter of semen is |
| | A) | approximately 500,000 |
| | B) | fewer than 20,000,000 |
| | C) | more than 2,000,000,000. |
| | D) | 75,000,000 to 400,000,000 |
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12 | | During spermatogenesis, which of the following undergoes a meiotic division to produce haploid cells? |
| | A) | spermatids |
| | B) | secondary spermatocytes |
| | C) | primary spermatocytes |
| | D) | spermatogonia |
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13 | | The function of the cremaster muscle is to |
| | A) | elevate the testes during sexual arousal and exposure to cold |
| | B) | generate peristaltic waves in the ductus deferens |
| | C) | control the release of secretions from the seminal vesicles |
| | D) | control the release of sperm cells from the testes into the epididymis |
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14 | | The form (stage) of developing male gamete located nearest to the basement membrane of a seminiferous tubule is the |
| | A) | spermatid |
| | B) | primary spermatocyte |
| | C) | secondary spermatocyte |
| | D) | spermatogonium |
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15 | | Leydig cells are located |
| | A) | in all the male accessory reproductive organs. |
| | B) | interspersed among developing sperm cells in seminiferous tubules. |
| | C) | lining the epididymis and ductus deferens. |
| | D) | in spaces between adjacent seminiferous tubules. |
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16 | | The immune system does NOT normally attack spermatogenic cells because |
| | A) | they are recognized as "self" structures. |
| | B) | they do not have any antigens on their cell membranes. |
| | C) | spermatogenic cells are protected by the blood-testis barrier. |
| | D) | the acrosome covers any antigens that would be recognized as foreign. |
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17 | | The process of crossing-over, or recombination, of genes occurs during |
| | A) | meiosis I. |
| | B) | meiosis II. |
| | C) | spermiogenesis. |
| | D) | spermiation. |
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18 | | All of the following are part of the spermatic cord EXCEPT the |
| | A) | testicular artery. |
| | B) | lymphatic vessels. |
| | C) | ductus deferens. |
| | D) | ejaculatory duct. |
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19 | | The function of fructose in semen is to |
| | A) | provide an energy source for ATP production by sperm. |
| | B) | promote coagulation of semen in the female reproductive tract. |
| | C) | buffer acids in the female reproductive tract. |
| | D) | inhibit the growth of bacteria in semen and the female reproductive tract. |
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20 | | The seminal vesicles are located |
| | A) | inferior to the prostate within the urogenital diaphragm. |
| | B) | within the lobules of the testes. |
| | C) | within the spermatic cord. |
| | D) | posterior and inferior to the urinary bladder, in front of the rectum. |
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21 | | Which of the following does NOT manufacture products that become part of semen? |
| | A) | seminiferous tubules |
| | B) | bulbourethral glands |
| | C) | penis |
| | D) | seminal vesicles |
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22 | | The amount of testosterone in the blood is increased by |
| | A) | a high level of testosterone stimulating the hypothalamus. |
| | B) | the hypothalamus stimulating the testes to release LH. |
| | C) | LH causing the interstitial cells to release testosterone. |
| | D) | a high level of testosterone stimulating the testes to release more LH. |
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23 | | If the testes fail to descend, a male is infertile because sperm cell formation is prevented by |
| | A) | relatively high internal body temperature. |
| | B) | excessive production of estrogen. |
| | C) | lack of testosterone. |
| | D) | None of the above. |
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24 | | The hormone responsible for the development and maintenance of male secondary sexual characteristics is |
| | A) | ICSH. |
| | B) | FSH. |
| | C) | testosterone. |
| | D) | gonadotropin-releasing hormone. |
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25 | | Male reproductive functions are controlled mainly by hormones from the hypothalamus, |
| | A) | posterior pituitary and adrenal glands. |
| | B) | anterior pituitary and adrenal glands. |
| | C) | posterior pituitary gland and testes. |
| | D) | anterior pituitary gland and testes. |
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26 | | The last fluid to be expelled from the urethra during ejaculation comes from the |
| | A) | testes. |
| | B) | bulbourethral gland. |
| | C) | prostate gland. |
| | D) | seminal vesicles. |
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27 | | The interstitial cells of the testes produce |
| | A) | seminal fluid |
| | B) | egg cells |
| | C) | sperm cells |
| | D) | androgens |
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28 | | Testosterone is produced by |
| | A) | spermatozoa. |
| | B) | sustentacular cells. |
| | C) | interstitial cells |
| | D) | the hypothalamus. |
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29 | | Maintenance of the male secondary sex characteristics is the direct responsibility of |
| | A) | estrogen. |
| | B) | testosterone. |
| | C) | FSH. |
| | D) | progesterone. |
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30 | | A function of FSH in the male is to |
| | A) | inhibit progesterone. |
| | B) | initiate testosterone production. |
| | C) | increase protein synthesis. |
| | D) | initiate spermatogenesis. |
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31 | | In the male, LH causes |
| | A) | initiation of spermatogenesis. |
| | B) | development of secondary sex characteristics. |
| | C) | testosterone production. |
| | D) | ejaculation. |
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32 | | The principal androgen is |
| | A) | ABP. |
| | B) | FSH. |
| | C) | testosterone. |
| | D) | HCG. |
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33 | | Egg cells are transported in the female reproductive tract by the ____, whereas sperm are transported in the male reproductive tract by the _____. |
| | A) | action of ciliated epithelium in the uterine tubes; movements of their tails |
| | B) | activity of seminal vesicle secretion; activity of prostate gland secretions |
| | C) | peristaltic contractions of the vaginal wall; peristaltic contractions of the uterus |
| | D) | movement of their tails; lashing movements of their tails |
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34 | | The first step in oogenesis is a |
| | A) | secondary oocyte divides to form a polar body and an egg cell. |
| | B) | primary oocyte divides to form a secondary oocyte and a first polar body. |
| | C) | follicle is converted to a corpus luteum. |
| | D) | corpus luteum is converted to a corpus albicans. |
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