Question 1

All of these organisms reproduce via external fertilization EXCEPT _____.

Accepted Answer

Fish, hydra, and coral are all known to reproduce via external fertilization, while birds reproduce via internal fertilization.

Question 2

Testosterone signals the production of sperm in the seminiferous tubules.This process begins with _____.

Accepted Answer

Testosterone signals the production of sperm in the seminiferous tubules, which begins with meiosis of sperm precursor cells in the seminiferous tubules.

Question 3

Birds and reptiles reproduce sexually via internal fertilization.Where does this fertilization take place?

Accepted Answer

Both birds and reptiles have a cloaca, which is a common opening for the reproductive, urinary, and digestive tracts. Internal fertilization takes place in the cloaca of these animals.

Question 4

Which type of assisted reproduction is more likely to result in multiple births?

Accepted Answer

Intrauterine insemination in conjunction with fertility drugs is more likely to result in multiple births because the drugs stimulate the ovaries to produce more eggs, increasing the chance of multiple fertilizations. In vitro fertilization with the transfer of one embryo is designed to reduce the risk of multiple births.

Question 5

Sperm develop in

Accepted Answer

Sperm develop in the seminiferous tubules of the testes.

Question 6

Which of these does NOT lead to infertility in men?

Accepted Answer

Endometriosis is a condition that affects women and causes infertility. It occurs when the tissue that lines the uterus grows outside of it, causing scarring and blockages in the reproductive system. Radiation, chemotherapy, and testicular injury can all lead to infertility in men.

Question 7

Why is IUI more likely to result in multiple births than IVF?

Accepted Answer

During IUI, semen is directly injected into the uterus, increasing the chance of multiple sperm fertilizing multiple eggs. In contrast, during IVF, only one or a few fertilized embryos are selected for implantation, decreasing the chance of multiple births. The other answer choices are not accurate.

Question 8

Human prenatal development lasts 9 months and is broken down into three trimesters.During which trimester do external genitalia develop?

Accepted Answer

External genitalia development typically occurs during the second trimester of human prenatal development.

Question 9

A decrease in testosterone production as men age can cause all of the following EXCEPT a _____.

Accepted Answer

While a decline in testosterone production can cause several changes in a man's body, including a decline in sperm quality, decrease in libido, decrease in sex drive, and decline in sperm quantity, it does not directly cause a decline in mental capacity. However, some studies suggest that there may be a link between low testosterone levels and cognitive decline in older men.

Question 10

The hormone hCG is an indicator of pregnancy;it also

Accepted Answer

hCG signals the corpus luteum to keep producing progesterone, which is necessary to maintain the early stages of pregnancy.

Question 11

For what reason has the American Society for Reproductive Medicine created guidelines to help reduce the number of multiples born as a result of IUI and IVF?

Accepted Answer

Multiples born as a result of IUI and IVF are at a higher risk of health problems such as premature birth, low birth weight, and developmental delays. Therefore, the American Society for Reproductive Medicine has created guidelines to help reduce the number of multiples born.

Question 12

A woman can become pregnant if she has intercourse 5 days before ovulating or on the day she ovulates,but not generally more than 24 hours after ovulation.What does this suggest about sperm and egg? Select the TWO correct answers.

Accepted Answer

Sperm can survive for up to 6 days in the female reproductive tract, which is why intercourse up to 5 days before ovulation can result in pregnancy. However, after ovulation, the egg only survives for around 24 hours, suggesting that human eggs cannot survive for very long after ovulation. Therefore, the correct choices are A and C. Choice B is incorrect because fertilization cannot occur in the ovary, it must occur in the fallopian tube where the egg and sperm meet.

Question 13

Which of the following could interfere with ovulation?

Accepted Answer

Chronically low levels of LH (Luteinizing Hormone) can interfere with ovulation because LH is crucial for triggering the release of an egg from the ovary.

Question 14

Why can untreated pelvic inflammatory disease lead to infertility?

Accepted Answer

Untreated pelvic inflammatory disease (PID) can lead to infertility because it can cause scarring and blockages in the oviducts (fallopian tubes), which can prevent the egg from being fertilized by sperm or make it difficult for the fertilized egg to travel to the uterus for implantation. The cervix is not affected by PID and ovulation and hormonal production are typically not impacted by the condition.

Question 15

Healthy ovaries are important to a woman's fertility.Which situation can lead to nonfunctional ovaries?

Accepted Answer

The answer of Healthy ovaries are important to a woman's...

Question 16

Which of the following would most directly cause reduced levels of estrogen production?

Accepted Answer

Estrogen production is directly stimulated by the follicle-stimulating hormone (FSH), which is produced by the anterior pituitary gland. If the anterior pituitary is damaged and unable to synthesize or release FSH, this would lead to reduced levels of estrogen production, as FSH is crucial for stimulating the ovaries to produce estrogen.

Question 17

Ovaries produce ________.

Accepted Answer

Ovaries produce both estrogen and progesterone, which are hormones. Additionally, ovaries produce and release mature eggs through ovulation, making all answer choices correct.

Question 18

All of these statements regarding in vitro fertilization are true EXCEPT _____.

Accepted Answer

Women are given drugs to stimulate ovulation, not implantation.

Question 19

The embryonic stage of fetal development lasts approximately _______ weeks after fertilization.

Accepted Answer

The embryonic stage of fetal development lasts approximately 8 weeks after fertilization, after which it is referred to as a fetus.

Question 20

Eggs are produced in the ________.

Accepted Answer

Eggs are produced in the ovaries.

Quiz 31: Reproductive System