Question 1

Spermiogenesis is the last stage of meiosis.

Accepted Answer

A) True 
 B)False

Question 2

The gene that codes for the testis-determining factor (TDF) is found in or on the __________.

Accepted Answer

A)  Y chromosome
B)  X chromosome
C)  gonadal ridges
D)  fetal testes
E)  mesonephrosF) A) and B)
G) A) and C)

Question 3

Sperm make up just 10% of semen volume.

Accepted Answer

A) True 
 B)False

Question 4

Sildenafil (Viagra) prolongs erection by __________.

Accepted Answer

A)  activating nitric oxide (NO)  production
B)  inactivating guanylate cyclase
C)  stimulating production of cGMP
D)  inhibiting degradation of cGMP
E)  inhibiting nitric oxide (NO)  productionF) All of the above
G) B) and C)

Question 5

In meiosis,each parent cell produces __________.

Accepted Answer

A)  two haploid cells
B)  four haploid cells
C)  two diploid cells
D)  four diploid cells
E)  haploid cells that are identical to the parent cellF) D) and E)
G) B) and C)

Question 6

A sperm count any lower than __________ million sperm per mL of semen is usually associated with infertility (sterility) .

Accepted Answer

A)  250 to 500
B)  200 to 250
C)  100 to 200
D)  50 to 100
E)  20 to 25F) D) and E)
G) B) and E)

Question 7

Which of the following does not play a role in thermoregulation of the testes?

Accepted Answer

A)  The bulbospongiosus muscle
B)  The cremaster muscle
C)  The pampiniform plexus of veins
D)  The countercurrent heat exchanger
E)  The dartos muscleF) D) and E)
G) B) and D)

Question 8

Sexual reproduction entails the union of two gonads to form a zygote.

Accepted Answer

A) True 
 B)False

Question 9

Dilation of the __________ causes the lacunae to fill with blood and the penis to become erect.

Accepted Answer

A)  helicine arteries
B)  internal pudendal (penile)  arteries
C)  dorsal arteries
D)  dorsal veins
E)  deep arteriesF) A) and D)
G) B) and C)

Question 10

Which of the following are not found in or around the seminiferous tubules?

Accepted Answer

A)  Interstitial (Leydig)  cells
B)  Germ cells
C)  Sustentacular (Sertoli)  cells
D)  Spermatids
E)  Corpus cavernosum cellsF) A) and D)
G) B) and E)

Question 11

__________ stimulates the interstitial cells of the testes to secrete __________.

Accepted Answer

A)  Gonadotropin-releasing hormone (GnRH) ; LH
B)  Follicle-stimulating hormone (FSH) ; androgen-binding protein (ABP) 
C)  Luteinizing hormone (LH) ; androgen-binding protein (ABP) 
D)  Luteinizing hormone (LH) ; testosterone
E)  Luteinizing hormone (LH) ; estrogenF) B) and D)
G) A) and B)

Question 12

__________ have 46 chromosomes,whereas __________ have 23.

Accepted Answer

A)  Spermatids; spermatozoa
B)  Primary spermatocytes; spermatids
C)  Secondary spermatocytes; primary spermatocytes
D)  Spermatogonia; primary spermatocytes
E)  Type A spermatogonia; type B spermatogoniaF) None of the above
G) B) and C)

Question 13

Which of the following hormones directly stimulates the development of male secondary sex characteristics?

Accepted Answer

A)  Estrogen
B)  Inhibin
C)  Luteinizing hormone
D)  Follicle stimulating hormone
E)  TestosteroneF) A) and C)
G) D) and E)

Question 14

The presence of the Y chromosome guarantees the development of male secondary sex organs.

Accepted Answer

A) True 
 B)False

Question 15

When do the testes start secreting testosterone?

Accepted Answer

A)  In the first trimester of fetal development
B)  In the first trimester after birth
C)  In the first three years after birth
D)  In the first three years of adolescence
E)  After the first ejaculationF) A) and C)
G) A) and E)

Question 16

Whether an organism will be genetically male or female is determined by __________.

Accepted Answer

A)  hormonal, genetic and environmental factors
B)  prenatal hormone exposure
C)  the egg
D)  the sperm
E)  the egg and sperm equallyF) A) and E)
G) A) and B)

Question 17

At what stage does a developing sperm cell begin to grow a tail?

Accepted Answer

A)  Spermatozoon
B)  Spermatid
C)  Primary spermatocyte
D)  Secondary spermatocyte
E)  SpermatogoniumF) D) and E)
G) A) and D)

Question 18

Myotonia of skeletal muscles is characteristic of the excitement phase and refractory period.

Accepted Answer

A) True 
 B)False

Question 19

At the end of meiosis I there are __________,whereas at the end of meiosis II there is/are __________.

Accepted Answer

A)  two diploid cells; one diploid cell
B)  two diploid cells; one haploid cell
C)  two diploid cells; four haploid cells
D)  two haploid cells; four haploid cells
E)  two haploid cells; one diploid cellF) B) and C)
G) A) and B)

Question 20

When it is cold,the __________ contracts and draws the testes closer to the body to keep them warm.

Accepted Answer

A)  cremaster muscle
B)  pampiniform plexus
C)  corpus spongiosum
D)  perineum
E)  corpus cavernosumF) All of the above
G) C) and E)

Exam 27: The Male Reproductive System

Sperm make up just 10% of semen volume.

Correct AnswerverifiedShow Answer

Which of the following hormones directly stimulates the development of male secondary sex characteristics?

Correct AnswerverifiedShow Answer

__________ have 46 chromosomes,whereas __________ have 23.

Correct AnswerverifiedShow Answer

A sperm count any lower than __________ million sperm per mL of semen is usually associated with infertility (sterility) .

Correct AnswerverifiedShow Answer

When do the testes start secreting testosterone?

Correct AnswerverifiedShow Answer

The presence of the Y chromosome guarantees the development of male secondary sex organs.

Correct AnswerverifiedShow Answer

Myotonia of skeletal muscles is characteristic of the excitement phase and refractory period.

Correct AnswerverifiedShow Answer

In meiosis,each parent cell produces __________.

Correct AnswerverifiedShow Answer

At the end of meiosis I there are __________,whereas at the end of meiosis II there is/are __________.

Correct AnswerverifiedShow Answer

Dilation of the __________ causes the lacunae to fill with blood and the penis to become erect.

Correct AnswerverifiedShow Answer

Spermiogenesis is the last stage of meiosis.

Correct AnswerverifiedShow Answer

Sildenafil (Viagra) prolongs erection by __________.

Correct AnswerverifiedShow Answer

Sexual reproduction entails the union of two gonads to form a zygote.

Correct AnswerverifiedShow Answer

Which of the following does not play a role in thermoregulation of the testes?

Correct AnswerverifiedShow Answer

Whether an organism will be genetically male or female is determined by __________.

Correct AnswerverifiedShow Answer

Which of the following are not found in or around the seminiferous tubules?

Correct AnswerverifiedShow Answer

At what stage does a developing sperm cell begin to grow a tail?

Correct AnswerverifiedShow Answer

__________ stimulates the interstitial cells of the testes to secrete __________.

Correct AnswerverifiedShow Answer

When it is cold,the __________ contracts and draws the testes closer to the body to keep them warm.

Correct AnswerverifiedShow Answer

The gene that codes for the testis-determining factor (TDF) is found in or on the __________.

Correct AnswerverifiedShow Answer

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have 46 chromosomes,whereas have 23.

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At the end of meiosis I there are ,whereas at the end of meiosis II there is/are .

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stimulates the interstitial cells of the testes to secrete .

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