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Exam 26: Reproduction and Development

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Question 31

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Researchers have found a general relationship between testicular cancer and exercise.Increased exercise is associated with a decrease in incidence of testicular cancer.However,a positive relationship (increased incidence of testicular cancer) was found between testicular cancer and riding bikes or horses.Several factors might be hypothesized to bring about this result.All but one of the following statements are reasonable hypotheses that researchers might follow to seek the cause for this relationship.Choose the exception.

A) Riding bikes or horses causes trauma to the testes.
B) The seat on bikes and the saddle on horses are made of material containing chemicals that damage testicular cells.
C) Riding bikes or horses increases scrotal temperature, which damages testicular cells.
D) Mutations that lead to testicular cancer make men more likely to ride bikes or horses.

E) A) and B)
F) A) and C)

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Question 32

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Which one of the following statements is TRUE?

A) Meiosis in oogenesis produces four mature eggs from one primary oocyte.
B) Oogenesis begins during puberty.
C) Spermatogenesis in an individual begins before that individual is born.
D) Oogenesis in humans is completed after stimulation by sperm.

E) A) and B)
F) A) and D)

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Question 33

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At about what point in gestation does the fetal heartbeat become audible by stethoscope and the fetus's movements easily felt by the mother?

Reproductive systems with external fertilization are most common in ________.

Which of the following correctly lists the three stages of labor,in the proper order?

The lifeline between the embryo and the placenta ________.

Scenario Questions Please read the following paragraph and then answer the following questions. Birth control methods act at many points in the reproductive cycle. Some options, such as birth control pills, are highly effective at preventing pregnancy. However, only a few commonly available methods are effective at preventing the transmission of sexually transmitted disease (STD) . The Center for Disease Control estimates that each year about 10 million new STD infections strike people ages 15 to 24. -A diaphragm functions as a birth control device by ________.

Which one of the following STDs is NOT caused by a virus?

Which one of the following is the earliest event in the process of fertilization?

The animal in the accompanying figure illustrates ________.

Which of the following substances stimulates contractions in uterine smooth muscle during labor?

Which of the following is associated with sexual reproduction?

Asexual reproduction ________.