Question 1

The uterine lining proliferates during the female cycle and then sloughs off in what process?

Accepted Answer

A)  implantation
B)  fertilization
C)  menstruation
D)  ovulation
E)  placentationF) B) and E)
G) A) and B)

Question 2

Why did internal fertilization likely evolve?

Accepted Answer

A)  To increase the chances of successful fertilization.
B)  As a response to copulation.
C)  Because there were no safe places to lay eggs.
D)  As an adaptation to life in a terrestrial environment.E) A) and C)
F) None of the above

Question 3

Which of the following determines genetic sex (male or female) in mammals?

Accepted Answer

A)  the Y chromosome contained in the egg
B)  the SRY gene on the Y chromosome
C)  the temperature of the developing fetus
D)  the genetic makeup of the parents
E)  the acrosome of the spermF) B) and E)
G) A) and E)

Question 4

A 38-year-old woman is going to ovulate in about a week.For how long has the primary oocyte in her Graafian follicle been arrested at prophase I of meiosis?

Accepted Answer

A)  About a day
B)  1 week
C)  3 weeks
D)  38 yearsE) C) and D)
F) None of the above

Question 5

What stimulates growth of ovarian follicles?

Accepted Answer

A)  Estradiol
B)  FSH
C)  LH
D)  Progesterone
E)  TestosteroneF) B) and E)
G) A) and D)

Question 6

What special feature of the ovum is facilitated by the production of polar bodies?

Accepted Answer

A)  large size of the cell
B)  extra layers of plasma membrane
C)  triploidy
D)  large size of the nucleusE) None of the above
F) A) and B)

Question 7

In females at puberty,what cells begin to secrete the major female sex hormone estradiol?

Accepted Answer

A)  oocyte cells
B)  corpus luteum
C)  follicle cells
D)  granulosa cellsE) A) and D)
F) B) and C)

Question 8

The scrotum is a sac-like structure outside the abdomen in which the testes are suspended.Why is this structure essential?

Accepted Answer

A)  Sperm must be closer to the penis to be ejaculated.
B)  There is not enough space in the abdomen to grow properly.
C)  Lower temperature is required for normal development of sperm.
D)  There is too much hormonal influence if they remain in the abdomen.E) A) and B)
F) A) and C)

Question 9

What describes marsupial embryos?

Accepted Answer

A)  They are born fully developed.
B)  They are born highly underdeveloped.
C)  They hatch from an internal egg.
D)  They hatch from an externally laid egg.
E)  They are nourished by the placenta.F) All of the above
G) A) and E)

Question 10

The immotile sperm develop motility in about 18 hours after arriving at the long,coiled tube called the

Accepted Answer

A)  vas deferens
B)  seminiferous tubules
C)  epididymis
D)  testisE) A) and B)
F) A) and C)

Question 11

What stimulates secretion of testosterone by Leydig cells?

Accepted Answer

A)  Estradiol
B)  FSH
C)  LH
D)  Testosterone
E)  ProgesteroneF) B) and E)
G) B) and D)

Question 12

What process is absent in mammals with an estrous cycle?

Accepted Answer

A)  oogenesis
B)  homeostasis
C)  ovulation
D)  menstruation
E)  placenta formationF) B) and C)
G) All of the above

Question 13

Choose the letter of the best match from the following:
-If a mutant organism used mitosis to produce gametes,what would be the result of mating with a wildtype partner?

Accepted Answer

A)  Progeny would be quadraploid,and almost certainly nonviable.
B)  Progeny would be triploid,and almost certainly nonviable.
C)  Progeny would be normal -- this is a common occurrence in some phyla.
D)  The resulting progeny would be identical twins.E) All of the above
F) B) and C)

Question 14

Which is a correct statement about reptile reproduction compared to bird reproduction?

Accepted Answer

A)  Birds are oviparous,reptiles are ovoviviparous.
B)  Both newly hatched birds and reptiles require parental care.
C)  Both exhibit external fertilization.
D)  The eggs of both birds and reptiles have protective shells.
E)  Male or female reptiles reproduce asexually; birds do not.F) A) and B)
G) A) and C)

Question 15

What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?

Accepted Answer

A)  He would produce twice as many sperm and would be protected against infertility from other causes.
B)  He would produce twice as many sperm,which would crowd them during later development and lead to morphological defects.
C)  He would be entirely normal,since this is what usually happens.
D)  After one round of sperm production he would no longer be able to produce sperm and would be infertile.E) A) and B)
F) A) and C)

Question 16

An adult male produces sperm continuously by meiotic division of cells lining what structure?

Accepted Answer

A)  Malpighian tubules
B)  Fallopian tubules
C)  seminiferous tubules
D)  epididymis tubules
E)  vas deferens tubulesF) B) and D)
G) A) and D)

Question 17

At a party,one of your friends has just revealed that he and his wife are trying to conceive.What do you advise him to avoid at the party?

Accepted Answer

A)  The loud music
B)  The raw vegetable appetizers
C)  The hot tub
D)  The melted cheese fondueE) C) and D)
F) All of the above

Question 18

In males,sterilization involves a vasectomy,which removes a portion of what structure?

Accepted Answer

A)  vas deferens
B)  epididymis
C)  seminiferous tubules
D)  Sertoli cellsE) B) and C)
F) A) and B)

Question 19

Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract.What is this called?

Accepted Answer

A)  synchronous fertilization
B)  external fertilization
C)  internal fertilization
D)  asexual fertilizationE) A) and B)
F) A) and C)

Question 20

Select the correct sequence of events of the human menstrual phase,beginning and ending with the menstrual cycle.

Accepted Answer

A)  menstrual phase → proliferative phase → ovulation → secretory phase → menstrual phase
B)  menstrual phase → ovulation → secretory phase → proliferative phase → menstrual phase
C)  menstrual phase → secretory phase → proliferative phase → ovulation → menstrual phase
D)  menstrual phase → proliferative phase → secretory phase → ovulation → menstrual phaseE) C) and D)
F) B) and D)

Exam 51: The Reproductive System

Which is a correct statement about reptile reproduction compared to bird reproduction?

Correct AnswerverifiedShow Answer

What would be the result for a patient if all his spermatogonia went through meiosis and proceeded to develop into spermatids?

Correct AnswerverifiedShow Answer

What describes marsupial embryos?

Correct AnswerverifiedShow Answer

A 38-year-old woman is going to ovulate in about a week.For how long has the primary oocyte in her Graafian follicle been arrested at prophase I of meiosis?

Correct AnswerverifiedShow Answer

What process is absent in mammals with an estrous cycle?

Correct AnswerverifiedShow Answer

The uterine lining proliferates during the female cycle and then sloughs off in what process?

Correct AnswerverifiedShow Answer

In males,sterilization involves a vasectomy,which removes a portion of what structure?

Correct AnswerverifiedShow Answer

Which of the following determines genetic sex (male or female) in mammals?

Correct AnswerverifiedShow Answer

Why did internal fertilization likely evolve?

Correct AnswerverifiedShow Answer

At a party,one of your friends has just revealed that he and his wife are trying to conceive.What do you advise him to avoid at the party?

Correct AnswerverifiedShow Answer

What special feature of the ovum is facilitated by the production of polar bodies?

Correct AnswerverifiedShow Answer

In females at puberty,what cells begin to secrete the major female sex hormone estradiol?

Correct AnswerverifiedShow Answer

What stimulates growth of ovarian follicles?

Correct AnswerverifiedShow Answer

An adult male produces sperm continuously by meiotic division of cells lining what structure?

Correct AnswerverifiedShow Answer

Terrestrial vertebrates and some fish evolved a form of fertilization in which the male gametes are introduced into the female reproductive tract.What is this called?

Correct AnswerverifiedShow Answer

The immotile sperm develop motility in about 18 hours after arriving at the long,coiled tube called the

Correct AnswerverifiedShow Answer

What stimulates secretion of testosterone by Leydig cells?

Correct AnswerverifiedShow Answer

Choose the letter of the best match from the following: -If a mutant organism used mitosis to produce gametes,what would be the result of mating with a wildtype partner?

Correct AnswerverifiedShow Answer

The scrotum is a sac-like structure outside the abdomen in which the testes are suspended.Why is this structure essential?

Correct AnswerverifiedShow Answer

Select the correct sequence of events of the human menstrual phase,beginning and ending with the menstrual cycle.

Correct AnswerverifiedShow Answer

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