Question 1

In the process of spermiogenesis,__________ become __________.

Accepted Answer

A)  spermatocytes; spermatozoa
B)  spermatozoa; spermatids
C)  spermatogonia; spermatocytes
D)  spermatocytes; spermatids
E)  spermatids; spermatozoaF) B) and C)
G) A) and E)

Question 2

Sympathetic nerve fibers trigger the secretion of nitric oxide,which dilates the deep arteries allowing blood to engorge the penis.

Accepted Answer

A) True 
 B)False

Question 3

Gonads begin to develop __________ weeks after fertilization.

Accepted Answer

A)  2 to 3
B)  5 to 6
C)  8 to 9
D)  20 to 24
E)  36 to 38F) A) and B)
G) B) and C)

Question 4

Which of the following is true regarding the blood-testis barrier?

Accepted Answer

A)  It prevents antibodies in the blood from getting to the germ cells.
B)  It prevents heat loss from the testes.
C)  It prevents blood from getting to the testes.
D)  It maintains testis temperature at 35 ∘\circ∘ C.
E)  It maintains testis temperature at 37 ∘\circ∘ C. F) A) and B)
G) A) and C)

Question 5

Sustentacular cells secrete inhibin,which regulates the rate of sperm production.

Accepted Answer

A) True 
 B)False

Question 6

The haploid result of meiosis I is called a __________.

Accepted Answer

A)  spermatogonium
B)  secondary spermatocyte
C)  primary spermatocyte
D)  spermatid
E)  spermF) B) and D)
G) C) and D)

Question 7

The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the __________.

Accepted Answer

A)  rete testis
B)  epididymis
C)  pampiniform plexus of veins
D)  blood-testis barrier
E)  scrotal portal systemF) A) and E)
G) C) and D)

Question 8

The deep region of the penis,surrounding the urethra,that engorges with blood during an erection is known as the ___________.

Accepted Answer

A)  epididymis
B)  corpus spongiosum
C)  corpus cavernosum
D)  scrotum
E)  ductus (vas)  deferensF) B) and D)
G) A) and D)

Question 9

Which of the following is inhibited by testosterone?

Accepted Answer

A)  Libido
B)  Development of secondary sex organs
C)  Development of secondary sex characteristics
D)  Gonadotropin-releasing hormone (GnRH)  secretion
E)  Sperm productionF) A) and E)
G) A) and D)

Question 10

The first haploid stage of spermatogenesis is prophase II.

Accepted Answer

A) True 
 B)False

Question 11

By volume,most of the semen is produced in the __________.

Accepted Answer

A)  testes
B)  penis
C)  prostate gland
D)  seminal vesicles
E)  bulbourethral glandsF) B) and E)
G) A) and D)

Question 12

Which of the following explains the neural mechanism of an erection?

Accepted Answer

A)  It is an autonomic reflex mediated predominantly by parasympathetic nerve fibers.
B)  It is an autonomic reflex mediated predominantly by sympathetic nerve fibers.
C)  It is a somatic reflex mediated predominantly by parasympathetic nerve fibers.
D)  It is a somatic reflex mediated predominantly by sympathetic nerve fibers.
E)  It is an exclusively voluntary action mediated by the cerebral cortex.F) C) and E)
G) B) and D)

Question 13

Which of the following is the most important role of meiosis in sexual reproduction?

Accepted Answer

A)  It reduces the size of the gametes.
B)  It produces at least one gamete that is mobile.
C)  It prevents the chromosome number from doubling in each generation.
D)  It ensures that each daughter cell doubles the number of chromosomes.
E)  It changes the genetic composition of each chromosome.F) A) and D)
G) A) and E)

Question 14

Which of the following is not a change in the male body that results from puberty?

Accepted Answer

A)  Deepening of the voice
B)  Gain in muscle mass
C)  Growth of the scrotum and penis
D)  Acne
E)  These are all changes associated with male puberty.F) A) and B)
G) A) and E)

Question 15

Sperm cells get energy to power their movement from __________,which is contributed by the __________.

Accepted Answer

A)  prostaglandins; prostate gland
B)  sucrose; bulbourethral gland
C)  fructose; seminal vesicles
D)  seminogelin; prostate gland
E)  semen; seminiferous glandF) A) and E)
G) B) and D)

Question 16

Heart rate,blood pressure,and respiratory rate peak during the __________.

Accepted Answer

A)  excitement phase
B)  erection of the penis
C)  climax (orgasm) 
D)  plateau phase
E)  resolution phaseF) C) and D)
G) B) and C)

Question 17

Which of the following is an androgen?

Accepted Answer

A)  Estrogen
B)  Progesterone
C)  Testosterone
D)  Luteinizing hormone (LH) 
E)  Follicle-stimulating hormone (FSH) F) A) and E)
G) C) and D)

Question 18

The acrosome contains enzymes used to __________.

Accepted Answer

A)  dissolve the mucosa of the vagina
B)  dissolve the mucosa of the uterus
C)  dissolve the stickiness of the semen
D)  penetrate the vagina
E)  penetrate barriers surrounding the ovumF) A) and D)
G) A) and E)

Question 19

The penile urethra is enclosed by the __________.

Accepted Answer

A)  corpus cavernosum
B)  corpus spongiosum
C)  trabecular muscle
D)  prepuce
E)  frenulumF) A) and E)
G) C) and E)

Question 20

The scrotum contains the testes and spermatic cords.

Accepted Answer

A) True 
 B)False

Exam 27: The Male Reproductive System

The deep region of the penis,surrounding the urethra,that engorges with blood during an erection is known as the ___________.

Correct AnswerverifiedShow Answer

Sustentacular cells secrete inhibin,which regulates the rate of sperm production.

Correct AnswerverifiedShow Answer

By volume,most of the semen is produced in the __________.

Correct AnswerverifiedShow Answer

The countercurrent heat exchanger that prevents arterial blood from overheating the testes is the __________.

Correct AnswerverifiedShow Answer

Sympathetic nerve fibers trigger the secretion of nitric oxide,which dilates the deep arteries allowing blood to engorge the penis.

Correct AnswerverifiedShow Answer

Heart rate,blood pressure,and respiratory rate peak during the __________.

Correct AnswerverifiedShow Answer

The scrotum contains the testes and spermatic cords.

Correct AnswerverifiedShow Answer

Gonads begin to develop __________ weeks after fertilization.

Correct AnswerverifiedShow Answer

The acrosome contains enzymes used to __________.

Correct AnswerverifiedShow Answer

The first haploid stage of spermatogenesis is prophase II.

Correct AnswerverifiedShow Answer

Which of the following is inhibited by testosterone?

Correct AnswerverifiedShow Answer

Which of the following is true regarding the blood-testis barrier?

Correct AnswerverifiedShow Answer

The haploid result of meiosis I is called a __________.

Correct AnswerverifiedShow Answer

In the process of spermiogenesis,__________ become __________.

Correct AnswerverifiedShow Answer

Sperm cells get energy to power their movement from __________,which is contributed by the __________.

Correct AnswerverifiedShow Answer

Which of the following is the most important role of meiosis in sexual reproduction?

Correct AnswerverifiedShow Answer

Which of the following is not a change in the male body that results from puberty?

Correct AnswerverifiedShow Answer

Which of the following is an androgen?

Correct AnswerverifiedShow Answer

Which of the following explains the neural mechanism of an erection?

Correct AnswerverifiedShow Answer

The penile urethra is enclosed by the __________.

Correct AnswerverifiedShow Answer

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In the process of spermiogenesis, become .

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Sperm cells get energy to power their movement from ,which is contributed by the .

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