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Exam 18: Development Throughout Life

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Question 31

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The union of the sperm and the egg that results in a cell with 46 chromosomes is called a(n) ________.

A) embryo
B) zygote
C) fetus
D) trophoblast

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

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Question 32

Multiple Choice

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What is the term for when a baby is born buttocks first?

A) placental stage
B) labor
C) breech birth
D) blue baby

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

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Question 33

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Several types of untreated sexually transmitted diseases can lead to scarring in the oviducts of the female.This can potentially lead to infertility because the sperm cannot get to the egg that has been released.What options might a female in this situation have if she wanted to conceive?

During the pre-embryonic period a single sperm passes through the zona pellucida.In the vast majority of cases,where does this process occur?

Environmental agents that disrupt development of the embryo or fetus are called ________.

A pregnant female is a week past her due date and her doctor decides to induce labor.Her physician will use pitocin,which is a synthetic form of which natural hormone?

A condition in which the placenta forms in the lower half of the uterus and covers the cervix,which may result in premature birth or maternal hemorrhage,is called ________.

When your mother is mad at you she likes to remind you that she spent 48 hours in painful labor to bring you into the world! Specifically,she means that she spent a long time in the ________ stage of labor.

Match each definition in the first column to the correct term in the second column. -During cleavage,the stage at which the pre-embryo becomes a solid ball with more than 12 cells.

The ________ is a primary germ layer that gives rise to muscle,bone,connective tissue,and organs such as the heart,kidneys,ovaries,and testes.

Both the nucleus in the head of the sperm and the mitochondria in the midpiece of the sperm include genetic information (DNA)about the father.The offspring,however,only contains nuclear DNA from the father but both mitochondrial and nuclear DNA from the mother.Why does the newborn lack the father's mitochondrial DNA?

What physiological processes are involved in lactation?

A(n)________ occurs when the blastocyst implants outside the uterus.

Match each definition in the first column to the correct term in the second column. -The rapid mitotic division of the zygote as it moves along the oviduct on its way to the uterus,becoming a pre-embryo.

The ________ is a group of cells that will develop into the chorion.

Explain how a pregnancy tests works.Make sure to indicate the hormone that the test detects and what the role of that hormone is during early pregnancy.

A significant percentage of pre-embryos fail to continue their development or to implant in the uterus.Explain what may happen to prevent development from continuing.

Match each definition in the first column to the correct term in the second column. -Process by which the blastocyst attaches to the uterine lining and begins to digest its way inward.

Which of the following is false concerning fertilization?

________ is a type of neural tube defect in which part of the spinal cord develops abnormally,as does the adjacent area of the spine.