Exam 28: Pregnancy and Human Development

A 28- year- old woman has been in the first stage of labor for several hours. Her uterine contractions are weak, and her labor is not progressing normally. Because the woman insists upon a vaginal delivery, the physician orders that pitocin (a synthetic oxytocin) be infused. What will be the effect of pitocin? What is the normal mechanism by which oxytocin acts to promote birth?

The _ cells of the blastocyst will take part in placental formation.

Neural tissue is formed by the _.

A blastocyst is a hollow ball of cells, while the morula is a solid ball of cells.

A pregnancy test involves antibodies that detect GH levels in a woman's blood or urine.

Figure 28.2Using Figure 28.2, match the following: -The first "milk" the mother produces is called .

An episiotomy is an incision made to widen the vaginal orifice, aiding fetal expulsion.

Proteases and acrosin are enzymes. How do they function in reproduction?

A 30- year- old woman is admitted to the emergency room. Her husband, who rode in the ambulance with her, said that she had suddenly complained of severe pain in the right iliac region of her abdomen and then had collapsed. Upon examination, she was shown to have signs of internal hemorrhage and her abdominal muscles were rigid. Her menstrual history revealed that she had missed her last menstrual period. A diagnosis of ruptured tubal, or ectopic, pregnancy was made and surgery scheduled. What is an ectopic pregnancy, and why is it problematic?

Cleavage as part of embryonic development is distinctive because it involves .

Conceptus is a term used to describe the developing human offspring.

Figure 28.2Using Figure 28.2, match the following: -Site of early blood cell production, and forms part of the gut (digestive tube).

The lactation nurse visits a first- time mother six hours after her delivery of a healthy 8- pound boy. The patient is giving the baby boy a bottle of sugar water. She tells the lactation nurse that she does not seem to be producing milk. What should the nurse say to the patient?

is a tissue with star- shaped cells that are free to migrate widely throughout the embryo.

The result of polyspermy in humans is .

A pregnant woman urinates more often than usual because the uterus compresses the bladder, and she must also dispose of fetal metabolic wastes.

Select the correct statement about the special fetal blood vessels.

Which of the following is not usually considered a teratogen?

Describe the events allowing monospermy.

Figure 28.2Using Figure 28.2, match the following: -Extraembryonic membrane that develops from the trophoblast and some extraembryonic mesoderm, and forms part of the placenta.