Question 1

Why does semen contain alkaline secretions?

Accepted Answer

A)   Alkaline secretions are less viscous and the sperm can swim better.
B)   The female vagina is acidic and thus not a favorable environment for sperm.
C)   Sperm are only able to use fructose under alkaline conditions.
D)   The pH of semen has no significance.E) A) and C)
F) C) and D)

Question 2

All of the following STDs are bacterial infections EXCEPT

Accepted Answer

A)   AIDS.
B)   chlamydia.
C)   gonorrhea.
D)   syphilis.E) B) and C)
F) A) and B)

Question 3

What is the probable biological and evolutionary function for a species of desert lizards to return to female-only reproduction?

Accepted Answer

A)   This species is probably going extinct.
B)   This is not at all unusual since most reptiles are asexual.
C)   The desert is uniform, and variation is of little or no advantage and a waste in energy.
D)   Such a switch in mating behavior is easily understood as a crossing-over in chromosomes.E) B) and C)
F) A) and C)

Question 4

Identify and briefly describe the function of the labeled structures on the sperm in the picture.  
A. acrosome: covers the head of the sperm and contains enzymes that help the sperm penetrate the egg
B. head: contains the genetic material
C. middle piece: connects the head of the sperm to the tail; contains many mitochondria that produce ATP
D. tail: a flagellum with the 9+2 arrangement of microtubules
E. end piece: thin, short segment of the tail containing the axial bundle of fibrils

Accepted Answer

A. acrosome: covers the head of the sper...

Question 5

The egg is propelled down the oviduct by

Accepted Answer

A)   cilia on the layer of nurse cells surrounding the egg.
B)   oviduct cilia and tubular muscle contractions.
C)   simply drifting on the prevailing current of body fluids.
D)   suction from the uterine contractions.E) A) and B)
F) A) and D)

Question 6

The structure from which an egg is released during ovulation is called a(n)

Accepted Answer

A)   ovarian cyst.
B)   primary follicle.
C)   corpus luteum.
D)   secondary follicle.
E)   Graafian follicle.F) None of the above
G) C) and D)

Question 7

The organ that exchanges molecules between fetal and maternal blood is the

Accepted Answer

A)   vagina.
B)   oviduct.
C)   uterus.
D)   placenta.
E)   mammary gland.F) B) and C)
G) B) and E)

Question 8

List the structures of the female reproductive system and indicate their function.

Accepted Answer

Ovaries - produce the egg and sex hormon...

Question 9

Identify the correct order of events for a person who has contracted an HIV infection.
A. The immune system reduces the virus levels in the blood.
B. HIV infected cells proliferate, increasing the number of infected helper T cells.
C. Patient experiences mild flu-like symptoms.
D. A deficiency in the number of helper T cells causes the patient to develop additional health problems.
E. The blood contains a high amount of the virus.
F. The virus mutates so it is not recognizable by the immune system.

Accepted Answer

A)   e - c - a - b - f - d
B)   d - c - a - b - f - e
C)   e - c - b - a - f - d
D)   e - a - b - c - f - d
E)   d - e - c - a - b - fF) A) and C)
G) C) and E)

Question 10

Which of the following STDs are preventable through the use of a vaccine?

Accepted Answer

A)   Hepatitis A and B
B)   HIV and gonorrhea
C)   Hepatitis A and HIV
D)   Syphilis and vaginal infections
E)   Hepatitis B and chlamydiaF) B) and D)
G) C) and D)

Question 11

Which form of birth control is the most effective at preventing the spread of sexually transmitted diseases?

Accepted Answer

A)   abstinence
B)   male condom
C)   female condom
D)   morning-after pills
E)   intrauterine deviceF) C) and D)
G) None of the above

Question 12

The medication known as mifepristone or RU-486

Accepted Answer

A)   kills sperm as they enter the female reproductive tract.
B)   blocks the progesterone receptors of cells in the uterine lining and causes the loss of an implanted embryo.
C)   prevents an egg from maturing and being released-essentially a stronger regular birth control pill.
D)   destroys the embryo which in turn causes a spontaneous miscarriage.
E)   prevents development of a uterine lining.F) B) and D)
G) B) and C)

Question 13

What is parthenogenesis?
A. a sexual means of internal fertilization
B. an asexual means of reproduction involving budding
C. an asexual means of reproduction by splitting or fission into several new individuals
D. a modification of sexual reproduction in which an unfertilized egg develops into a complete individual
E. a sexual means of reproduction by which cross-fertilization occurs between hermaphrodites

Accepted Answer

Answers: A. Parthenogenesis is a modific...

Question 14

The lining of the uterus that is discharged during the menstrual phase is the

Accepted Answer

A)   endocardium.
B)   endometrium.
C)   oviduct.
D)   hymen.
E)   myocardium.F) B) and C)
G) A) and B)

Question 15

Which of the following statements about asexual reproduction is NOT true?

Accepted Answer

A)   Asexual reproduction occurs with only one parent.
B)   Asexual reproduction is less commonly used by vertebrates.
C)   Asexual reproduction can occur by budding or by division and regeneration.
D)   A large number of offspring can be produced in this way in a short time.
E)   Asexual reproduction produces variation that allows the species to adapt quickly to changing environmental conditions.F) A) and B)
G) A) and E)

Question 16

In a species of desert lizard, only females are known to exist. It is necessary for two females to court and for one to assume the posture of a male to stimulate the other female to ovulate. Of course, no fertilization can occur. This is a case of

Accepted Answer

A)   hermaphroditism.
B)   parthenogenesis.
C)   sexual reproduction because the mating behavior is required.
D)   a need for further research since only primitive animals can reproduce asexually.E) B) and D)
F) B) and C)

Question 17

In the human male, sperm cells are produced in the ____ and are suported by the ________.

Accepted Answer

A)   interstitial tissue; cervix
B)   urethra; uterus
C)   seminiferous tubules; Sertoli cells
D)   vas deferens; endometrium
E)   seminal vesicles; oviductF) A) and B)
G) A) and C)

Question 18

Which of the following is not one of the stages of HIV infection?

Accepted Answer

A)   A greater than 500 CD4 + T cells per microliter of blood.
B)   A CD4 + T cell count between 200 and 499 per microliter of blood.
C)   A CD4 + T cell count below 200 per microliter of blood.
D)   Opportunistic infections.
E)   Flat or raised lesions on the penis or vulva.F) A) and B)
G) B) and E)

Exam 41: Reproductive Systems

Which of the following is not one of the stages of HIV infection?

Correct Answer
verified

In the human male, sperm cells are produced in the and are suported by the ____.

Correct Answer
verified

Which form of birth control is the most effective at preventing the spread of sexually transmitted diseases?

Correct Answer
verified

The structure from which an egg is released during ovulation is called a(n)

Correct Answer
verified

Why does semen contain alkaline secretions?

Correct Answer
verified

What is the probable biological and evolutionary function for a species of desert lizards to return to female-only reproduction?

Correct Answer
verified

The lining of the uterus that is discharged during the menstrual phase is the

Correct Answer
verified

In a species of desert lizard, only females are known to exist. It is necessary for two females to court and for one to assume the posture of a male to stimulate the other female to ovulate. Of course, no fertilization can occur. This is a case of

Correct Answer
verified

The egg is propelled down the oviduct by

Correct Answer
verified

Correct Answer
verified
A. acrosome: covers the head of the sper...
View Answer

Which of the following statements about asexual reproduction is NOT true?

Correct Answer
verified

The organ that exchanges molecules between fetal and maternal blood is the

Correct Answer
verified

The medication known as mifepristone or RU-486

Correct Answer
verified

All of the following STDs are bacterial infections EXCEPT

Correct Answer
verified

Correct Answer
verified

List the structures of the female reproductive system and indicate their function.

Correct Answer
verified
Ovaries - produce the egg and sex hormon...
View Answer

Correct Answer
verified
Answers: A. Parthenogenesis is a modific...
View Answer

Which of the following STDs are preventable through the use of a vaccine?

Correct Answer
verified

Exam 41: Reproductive Systems

Which of the following is not one of the stages of HIV infection?

Correct AnswerverifiedShow Answer

In the human male, sperm cells are produced in the ____ and are suported by the ________.

Correct AnswerverifiedShow Answer

Which form of birth control is the most effective at preventing the spread of sexually transmitted diseases?

Correct AnswerverifiedShow Answer

The structure from which an egg is released during ovulation is called a(n)

Correct AnswerverifiedShow Answer

Why does semen contain alkaline secretions?

Correct AnswerverifiedShow Answer

What is the probable biological and evolutionary function for a species of desert lizards to return to female-only reproduction?

Correct AnswerverifiedShow Answer

The lining of the uterus that is discharged during the menstrual phase is the

Correct AnswerverifiedShow Answer

In a species of desert lizard, only females are known to exist. It is necessary for two females to court and for one to assume the posture of a male to stimulate the other female to ovulate. Of course, no fertilization can occur. This is a case of

Correct AnswerverifiedShow Answer

The egg is propelled down the oviduct by

Correct AnswerverifiedShow Answer

Correct AnswerverifiedA. acrosome: covers the head of the sper...View AnswerShow Answer

Which of the following statements about asexual reproduction is NOT true?

Correct AnswerverifiedShow Answer

The organ that exchanges molecules between fetal and maternal blood is the

Correct AnswerverifiedShow Answer

The medication known as mifepristone or RU-486

Correct AnswerverifiedShow Answer

All of the following STDs are bacterial infections EXCEPT

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

List the structures of the female reproductive system and indicate their function.

Correct AnswerverifiedOvaries - produce the egg and sex hormon...View AnswerShow Answer

Correct AnswerverifiedAnswers: A. Parthenogenesis is a modific...View AnswerShow Answer

Which of the following STDs are preventable through the use of a vaccine?

Correct AnswerverifiedShow Answer

Correct Answer
verified

In the human male, sperm cells are produced in the and are suported by the ____.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A. acrosome: covers the head of the sper...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Ovaries - produce the egg and sex hormon...
View Answer

Correct Answer
verified
Answers: A. Parthenogenesis is a modific...
View Answer

Correct Answer
verified