Exam 25: Development Throughout Life

Which of the following has not been shown to slow down the signs of aging in humans?

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

Carla is taking a home pregnancy test to find out whether she is pregnant. If this test comes back positive, which hormone has it detected in Carla's urine?

________ are blocks of mesoderm that eventually form skeletal muscles of the neck and trunk, connective tissue, and vertebrae.

Larissa had a painful pelvic inflammatory disease, which meant that she was more likely than other women to have an implantation in the ________.

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

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

Heart cells in the embryo will be derived from which germ layer?

Why do harmful agents cause the most severe birth defects during the embryonic period?

Several types of untreated sexually transmitted diseases can lead to scarring in the oviducts of the female. This can potentially cause infertility if the scarring prevents the sperm from reaching the egg that has been released. What options might a woman in this situation have if she wanted to conceive?

How does the nervous system change with aging?

Iskander wants to live as long as his great-grandfather, who died at 104, strong and healthy almost to the last. What are some things that could make a difference for his pathway to good health and long life?

Suppose someone told you that the activities of a pregnant female have no effect on the embryo during early embryonic development because the placenta is not fully formed until later. How would you respond to this statement?

What term describes the birth of a baby buttocks first?

Once the fertilized ovum has divided into two cells, it is called the ________.

It is possible for an individual to be genotypically one gender but appear to be the opposite gender. Suppose an individual is genotypically male (XY) but has developed as a female. Explain what has happened and when it might have happened.

Labor is directly triggered by the hormone ________, which also triggers ________ after birth.

James and Sally wanted to have a baby but were not having any luck, so they decided to try an artificial means of conception. They eventually were directed to a laboratory, where sperm and eggs were placed in a dish. This allows a sperm to merge with the egg as it would in the oviduct. This procedure is called ________.

This embryonic structure will become the embryo's part of the placenta.

The fetal period is characterized by ________.