Exam 47: Growth, Development, and Aging

Which of the following hormones is not produced by the placenta?

The enlargement of the testes is often the first sign of puberty in boys.

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

In the developing human embryo, the heart begins to beat at about _____ weeks.

Stan and Dan are twins. Stan suffers from kidney disease. The physicians said Stan can receive Dan's kidney with very little chance of rejection. Explain why.

A pluripotent cell is the ancestor to all body cell types.

Stem cells in adults are referred to as:

Some home pregnancy tests measure the amount of hCG in a woman's urine. Why is this substance an accurate sign of pregnancy? What structure produces hCG?

The chorion develops from the blastocyst to become an important fetal membrane of the placenta.

Implantation occurs during the _____ stage.

Which of the following describe the development of the female reproductive system?

Multipotent cells can be found in the skin, fat, many glands, muscles, bone, and the gastrointestinal tract.

In older adulthood many dead cells are not replaced causing a degeneration of tissues.

The placental tissues secrete large amounts of human chorionic gonadotropin (hCG) early in pregnancy.

The primary germ layers include the endoderm, ectoderm, and mesoderm.

In the human, the haploid number of chromosomes is:

Multiple-birth babies are often born prematurely.

Over-the-counter "early pregnancy" tests detect the presence of the hCG that is excreted in the urine during the first couple of months of a pregnancy.

What are stem cells? Differentiate between totipotent, pluripotent, and multipotent stem cells. Which types of stem cells are found in adults?

Match each term with its corresponding definition. -Formation of tissues from the primary germ layers of the embryo