Exam 21: Development and Aging

As the onset of labor approaches, estrogen is released by the placenta, and increases the number of oxytocin receptors.

During labor, full dilation of the cervix signifies the end of the ________ stage.

During puberty, the secretion of GnRH causes the secretion of ________, which in turn stimulate(s) the production of sex hormones.

Ejection of milk from the breasts is caused by the hormone ________.

Oxytocin from the mother's pituitary gland targets what organ to begin contractions?

The development of an embryo involves four processes. Match each process to its description. -cells divide rapidly, resulting in a ball of unspecialized cells

With the exception of cancer cells, most cells divide approximately ________ times before they stop reproducing.

When the fetal pituitary gland matures, it releases ________, which triggers the sequence of events referred to as "labor."

During embryonic development, the second cavity that forms in the blastocyst becomes filled with amniotic fluid.

While normally one secondary oocyte ruptures from an ovarian follicle at ovulation, what will be the result if two are released and both are fertilized?

The entire duration of a person's life is referred to as ________.

The stages of labor, in order, include

Match the special structures of the fetal cardiovascular system with their descriptions. -structure that transports deoxygenated blood from the fetus to the placenta

Which one of the following organs is not fully developed in a fetus and is therefore bypassed by the ductus arteriosus?

The process by which an embryo undergoes rapid changes in form and shape is called

For sperm to be able to penetrate the zona pellucida of the egg, enzymes are released from the ________.

The first phase of labor is contractions.

A zygote forms when

Mesoderm gives rise to

The complete failure of which of the following organs or organ systems does NOT necessarily lead to a quick death?