Exam 25: Development Throughout Life

Which of the following is a neural tube defect that involves incomplete development of the brain and results in stillbirth or death shortly after birth?

Primordial germ cells can be found in the ________ of the developing female embryo.

Which of the following is false concerning fertilization?

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

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.

Normally, fertilization occurs in the ________, and implantation occurs in the ________.

The period that begins at week 9 of development is the ________.

Explain how a pregnancy test works. Make sure to indicate the hormone that the test detects and the role that hormone plays during early pregnancy.

The central nervous system develops from the same area from which this is derived.

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 ________.

A male has a genetic disease coded for on his Y chromosome. This disease has been seen in his family in past generations. Which parent passed on this trait?

Which of the following is a germ layer that forms the lining of the urinary, respiratory, and digestive tracts?

The blastocyst attaches to the ________ about 6 days after fertilization and begins to digest its way inward.

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, contains only nuclear DNA from the father but both mitochondrial and nuclear DNA from the mother. Why does the newborn lack the father's mitochondrial DNA?

The ________ is the organ that delivers oxygen and nutrients and removes carbon dioxide and wastes for the embryo and later fetus.

The pre-embryo becomes a hollow ball of cells with a fluid-filled cavity by about day 6 of development. This stage is called a ________.

When two secondary oocytes are released from the ovaries and are fertilized by different sperm cells, what is the result?

In fetal circulation, most blood is shunted away from the lungs. Why is this the case?