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| 1 | |
A zygote is a: (p. 1017) |
| | A) | fertilized egg |
| | B) | a sex cell |
| | C) | an immature spermatozoan |
| | D) | chromosome |
| | E) | protein in the ovum |
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| 2 | |
This part of the sperm contains enzymes that are used to penetrate the egg: (pp. 1034-1036) |
| | A) | midpiece |
| | B) | acrosome |
| | C) | nucleus |
| | D) | principal piece |
| | E) | axoneme |
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| 3 | |
The new erectile dysfunction drug viagra (p. 1040) |
| | A) | increases nitric oxide release |
| | B) | stimulates parasympathetic output |
| | C) | inhibits the breakdown of the cGMP |
| | D) | inhibits sympathetic output |
| | E) | blocks the flow of blood out of the penis |
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| 4 | |
The human papillomavirus causes: (pp. 1042-4043) |
| | A) | syphillis |
| | B) | AIDS |
| | C) | the clap |
| | D) | pelvic inflammatory disease |
| | E) | genital warts |
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| 5 | |
Men are not at risk for breast cancer. (table 27.2, p. 1041) |
| | A) | True |
| | B) | False |
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| 6 | |
In a developing fetus, androgens must be present in order to develop a male reproductive tract; likewise, estrogens must be present in order to develop a female reproductive tract. (pp. 1018-1020) |
| | A) | True |
| | B) | False |
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| 7 | |
Sperm complete the maturation process while they are contained within this structure: |
| | A) | the testis |
| | B) | the urethra |
| | C) | the prostate |
| | D) | the epididymis |
| | E) | the seminal vesicles |
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| 8 | |
The benefit of sexual reproduction is genetic diversity. |
| | A) | True |
| | B) | False |
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| 9 | |
Two essential properties for gametes are motility and fission. |
| | A) | True |
| | B) | False |
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| 10 | |
Organs that produce gametes are called secondary sex organs. |
| | A) | True |
| | B) | False |
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| 11 | |
Every egg cell contains an X chromosome. |
| | A) | True |
| | B) | False |
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| 12 | |
During development, androgens induce the formation of male reproductive organs and estrogen induces the formation of female reproductive organs. |
| | A) | True |
| | B) | False |
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| 13 | |
Male and female organs that develop from the same embryonic tissue are called |
| | A) | heterozygous. |
| | B) | homozygous. |
| | C) | homologous. |
| | D) | abnormalities of sexual development. |
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| 14 | |
A cord that connects the scrotum to the gonad and guides the testes into the scrotum during development is called the |
| | A) | testicular arteries. |
| | B) | sperm duct. |
| | C) | vas deferens. |
| | D) | gubernaculum. |
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| 15 | |
During the physical examination of a male, the doctor may palpate the inguinal canal through which the testes descend and have the patient cough. What condition could be diagnosed with this test? |
| | A) | inguinal hernia |
| | B) | undescended testes |
| | C) | sciatica |
| | D) | aneurysm |
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| 16 | |
Sperm are produced by |
| | A) | seminiferous tubules. |
| | B) | interstitial cells. |
| | C) | sertoli cells. |
| | D) | sustentacular cells. |
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| 17 | |
The testicular artery branches directly off the abdominal aorta, so its blood pressure is relatively high. |
| | A) | True |
| | B) | False |
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| 18 | |
To regulate the temperature of the testes, which of the following muscles raises and lowers the scrotum? |
| | A) | cremaster muscle |
| | B) | dartos muscle |
| | C) | pampiniform plexus of muscles |
| | D) | perineal raphe muscle |
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| 19 | |
The blood to the testes is cooled by the |
| | A) | rete testes. |
| | B) | ductus deferens. |
| | C) | pampiniform plexus. |
| | D) | perineal raphe. |
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| 20 | |
Sperm maturation and storage occurs mainly in which of the following structures? |
| | A) | epididymis |
| | B) | seminal vesicle |
| | C) | ductus deferens |
| | D) | seminiferous tubules |
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| 21 | |
The ductus deferens and the duct of the seminal vesicle join to form the ejaculatory duct. |
| | A) | True |
| | B) | False |
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| 22 | |
60% of semen consists of |
| | A) | sperm cells. |
| | B) | secretions of the bulbourethral glands. |
| | C) | secretions of the prostate gland. |
| | D) | secretions of the seminal vesicles. |
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| 23 | |
An early symptom of prostate cancer is difficulty in urination. |
| | A) | True |
| | B) | False |
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| 24 | |
The corpus spongiosum on the ventral aspect of the penis encloses the urethra. |
| | A) | True |
| | B) | False |
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| 25 | |
FSH stimulates the interstitial cells of the testes to secrete androgens. |
| | A) | True |
| | B) | False |
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| 26 | |
Meiosis is the splitting of a cell into two identical diploid cells. |
| | A) | True |
| | B) | False |
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| 27 | |
Crossing-over of DNA segments occurs in |
| | A) | mitosis I. |
| | B) | anaphase I. |
| | C) | meiosis II. |
| | D) | prophase I. |
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| 28 | |
After the meiosis I phase of spermatogenesis, there are two equal-sized haploid cells called |
| | A) | spermatogonias. |
| | B) | primary spermatocytes. |
| | C) | secondary spermatocytes. |
| | D) | spermatids. |
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| 29 | |
The transformation of each spermatid into a spermatozoan is called spermiogenesis. |
| | A) | True |
| | B) | False |
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| 30 | |
The thickest portion of the sperm tail contains mitochondria and is called the principal piece. |
| | A) | True |
| | B) | False |
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| 31 | |
Seminal vesicles secrete all of the following except |
| | A) | fructose. |
| | B) | fibrinogen. |
| | C) | sustentacular fluid. |
| | D) | prostaglandins. |
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| 32 | |
Penile erection is mediated by parasympathetic nerve fibers, while ejaculation is mediated by the sympathetic nerve fibers. |
| | A) | True |
| | B) | False |
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| 33 | |
Three bacterial STDs are gonorrhea, syphilis, and hepatitis B. |
| | A) | True |
| | B) | False |
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| 34 | |
How is it that an embryo differentiates to be a male? |
| | A) | the Y chromosome has the testis-determining factor gene |
| | B) | the paramesonephric duct develops |
| | C) | the fetus has no HCG receptors |
| | D) | there is no mullerian-inhibiting factor |
| | E) | the mesonephric ducts degenerate |
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| 35 | |
When the testis fails to descend, the condition is called: |
| | A) | hypospadias |
| | B) | prostitis |
| | C) | cryptorchidism |
| | D) | smegma |
| | E) | climacteric |
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| 36 | |
The most correct route for the sperm from the seminiferous tubules to the outside is: |
| | A) | epididymis > ductus deferens > ejaculatory duct > ampulla > urethra |
| | B) | epididymis > ductus deferens > ampulla > ejaculatory duct > urethra |
| | C) | ductus deferens > epididymis > ampulla > ejaculatory duct > urethra |
| | D) | ductus deferens > epididymis > urethra > ampulla > ejaculatory duct |
| | E) | ejaculatory duct > ductus deferens > epididymis > ampulla > urethra |
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| 37 | |
An enlargement of this organ will impair both sexual reproduction and voiding in the man: |
| | A) | bulbourethral gland |
| | B) | seminal vesicles |
| | C) | seminiferous tubules |
| | D) | ampulla |
| | E) | prostate |
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| 38 | |
This hypothalamic hormone stimulates certain anterior pituitary cells to produce gonadotropins: |
| | A) | GH |
| | B) | testosterone |
| | C) | DHT |
| | D) | GnRH |
| | E) | CRH |
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| 39 | |
In this stage, the homologous chromosomes first start to move to opposite poles: |
| | A) | prophase I |
| | B) | metaphase I |
| | C) | metaphase II |
| | D) | anaphase I |
| | E) | anaphase II |
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| 40 | |
This is the primary means to provide energy for sperm movement: |
| | A) | fats |
| | B) | mannose |
| | C) | fructose |
| | D) | spermaceti |
| | E) | phospholipids |
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| 41 | |
Emission of the sperm involves these activities: |
| | A) | spasmodic contractions of the bulbospongiosus |
| | B) | contraction of the trabecular muscles |
| | C) | detumescent penis |
| | D) | internal pudendal artery constricts |
| | E) | peristalsis of the ductus deferens and prostate |
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| 42 | |
This seminal fluid component has as its primary role counteracting the low pH of the vagina: |
| | A) | prostaglandin |
| | B) | spermine |
| | C) | fibrinolysin |
| | D) | fructose |
| | E) | mannose |
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| 43 | |
The midpiece of the spermatozoon tail contains the: |
| | A) | mitochondria |
| | B) | nucleus |
| | C) | acrosome |
| | D) | basal body |
| | E) | principal piece |
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