Exam 21: Development and Aging

Labor is triggered when which one of the following fetal organs or systems is mature?

All of the following processes are associated with embryonic development EXCEPT which one?

Which one of the following embryonic features is the forerunner of the brain and spinal cord?

The blastocyst begins to form a second hollow cavity that will eventually become the

The blood vessels of the umbilical cord are derived from which one of the following structures?

Many sperm entering the vagina are killed by the acidic secretions of the female reproductive tract.

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

The placenta forms from embryonic tissue and

During the development following fertilization, the morula becomes a hollow ball of cells called the

Which one of the following is TRUE regarding an aging nervous system?

The spontaneous ending of a pregnancy that results in the premature expulsion of the embryo is termed a(n) ________.

Prior to the union of the chromosomes of the egg and sperm, meiosis II is completed by the ovum.

The chances of "aging well" can be increased through a healthy diet and regular exercise.

The extra-embryonic membrane known as the ________ is the source of germ cells that eventually develop into gametes.

To penetrate the zona pellucida of the ovum, the sperm

In the fetus, the ductus arteriosus shunts blood from the pulmonary artery directly to the lung.

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

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

What marks the end of the pre-embryonic period and the beginning of the embryonic period?

The number of oxytocin receptors present in the uterus increases due to the action of