Human Reproduction

Question 1

Which statement correctly explains how a mother’s lifestyle can affect her developing baby during pregnancy?

Accepted Answer

Nicotine from cigarettes can cross the placenta and may restrict the fetus’s growth, showing that a mother’s smoking can affect the baby.

Answer

Exercise during pregnancy reduces oxygen to the fetus because the placenta cannot supply enough blood during physical activity.

Answer

The placenta blocks all substances from the mother, so a mother’s diet or habits cannot influence the baby’s development.

Answer

Only the father’s lifestyle can affect the baby because the mother’s genes determine all fetal traits.

Question 2

Which structure in the female reproductive system connects the mother's blood supply to the baby's blood supply during pregnancy?

Accepted Answer

Placenta

Answer

Fallopian tube

Answer

Uterus

Answer

Ovaries

Question 3

After a male’s sperm enter a female’s reproductive tract, they must travel to the place where the egg is waiting. Which statement correctly describes the steps the sperm take and identifies where fertilisation actually occurs?

Accepted Answer

Sperm move up the cervix, through the uterus, into the fallopian tube; fertilisation occurs in the ampulla of the tube after a sperm penetrates the egg’s outer layer, and the resulting zygote then moves toward the uterus.

Answer

After entering the vagina, sperm remain there until the next ovulation, at which time the egg is released into the uterus and meets the sperm there for fertilisation.

Answer

Sperm travel through the cervix and uterus, reach the fimbriae of the fallopian tube, where they immediately fuse with the egg that is still inside the ovary.

Answer

Sperm travel directly from the vagina into the ovary, where they join with the egg; fertilisation takes place inside the ovarian follicle before the egg is released.

Try three questions

Which statement correctly explains how a mother’s lifestyle can affect her developing baby during pregnancy?

Which structure in the female reproductive system connects the mother's blood supply to the baby's blood supply during pregnancy?

After a male’s sperm enter a female’s reproductive tract, they must travel to the place where the egg is waiting. Which statement correctly describes the steps the sperm take and identifies where fertilisation actually occurs?

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