Exam 47: Growth, Development, and Aging

Adolescence is characterized by the maintenance of existing body tissues.

The chorionic villi bring the embryonic circulation to the placenta.

The science of the development of the offspring before birth is called gerontology.

Which of the following structures is not formed by the endoderm?

The decrease in estrogen levels associated with menopause may offset the effects of osteoporosis.

If the process of oogenesis goes to completion, how many polar bodies will be produced?

Meiosis reduces the number of chromosomes in each daughter cell to half the number present in the parent cell.

Identical twins usually share the same placenta.

The dermis of the skin, skeletal muscles, and bones are derived from the mesoderm.

Some gerontologists believe that aging is "preprogrammed."

An acrosome reaction occurs when enzymes from the acrosome break down the outer layers of the ovum, rendering it inactive.

The embryonic phase of development extends from fertilization until the end of the eighth week of gestation.

Theca cells produce:

Adult stem cells are usually called multipotent and are found in many tissues of the body.

Which of the following structures is not formed by the ectoderm?

Muscle atrophy in the bladder wall results in decreased capacity to void completely.

During infancy, the lumbar curvature appears between the _____ months.

At the end of the first trimester of gestation the fetus becomes known as a fetus.

Hypertension becomes less common as we advance in age.

Body fat under the skin increases as we age.