Exam 23: Pregnancy, Growth, and Development

Some factors that help to stimulate the newborn's first breath are increasing CO₂, decreasing pH, decreasing O₂, decreasing body temperature, and mechanical stimulation.

The slender projections that grow out from the trophoblast into the uterine wall are called ________.

The process of growing old is called ________.

Dizygotic twins result from

Some women prolong breastfeeding or lactation in general as a form of birth control. How would extension of lactation be effective in preventing pregnancy?

The major body parts derived from mesoderm are the

Fertilization usually occurs in the

A researcher engineers a deletion in the genome of sperm cell DNA that inhibits production of an enzyme in the sperm cell membrane. The researcher then adds the sperm to a culture dish with a secondary oocyte, along with chemicals to guide the sperm to the oocyte. Upon observation, it is found that the sperm fails to penetrate the corona radiata of the oocyte. What enzyme has been deleted from the sperm membrane?

Aging-related changes include shrinking of the prostate in men and enlargement of the breasts in women.

Progesterone in semen stimulates the movement of sperm cells.

Upon examination of a zygote, a developmental biologist discovers that it possesses 47 chromosomes. What does this indicate?

Centenarians are

Preimplantation genetic diagnosis works because

The chorion ________ and the amnion ________.

The hormones that maintain the uterine wall during the last 5 to 6 months of pregnancy are

Human life span is ________ years.

The period of development during which the contents of a zygote are divided into increasingly smaller cells is called ________.

Human prenatal development takes ________ weeks.

The term newborn refers to the period from birth through ________, whereas the term infant refers to the period from ________.

The structure that surrounds the cell membrane of the secondary oocyte is the ________.