Exam 36: A: Growth and Development

A change in the organ of Corti,which is common in the elderly,requires bifocal glasses for correction.

Gerontologists have found that aging may be linked to the reproductive limit of human cells.

Multiple-birth babies are at greater risk for complications because they are often born prematurely.

Because progesterone and estrogen are needed throughout pregnancy,the corpus luteum is maintained until the baby is born.

The science of the development of the individual before birth is prenatology.

The first polar body is a diploid structure.

During oogenesis,two polar bodies are produced,one during meiosis I and one during meiosis II.

The cells of the primary germ layers are not totipotent stem cells,but they are multipotent stem cells.

In the human,the function of the yolk sac is to provide nutrients to the embryo.

Gestation is divided into three approximately equal time periods called trimesters.

Hormones such as cortisol and oxytocin,along with prostaglandins E and F,are important in the birth process.

A cesarean section is the delivery of a baby by a surgical procedure.

A major function of amniotic fluid is to act as a shock absorber.

The decrease in progesterone levels accounts for the common symptoms of menopause.

By age 14,all of the deciduous teeth have been lost.

Osteoarthritis is a degenerative joint disease that is common in elderly adults.

The mesoderm forms the linings of various tracts,as well as several glands.

Agents that disrupt normal development of the fetus are called teratogens.

Another name for a sex cell is a gamete.

The process by which the primary germ layers develop into many different kinds of tissues is called organogenesis.