Fertilization and Fetal Development

Name the hormone produced by cells around the embryo that maintains the corpus luteum during pregnancy.

• Estrogen

• Progesterone

• hCG

• FSH

What is the function of chorion?

• To absorb shock in case of fall

• To form blood cells

• To provide nourishment for the fetus

• to permit gas exchange

Which of the following does the nervous system arise from?

• ectoderm

• mesoderm

• endoderm

• epidermis

Which portion of the blastula becomes the embryonic placenta?

• inner cell mass

• embryonic disc

• chorion

• primitive streak

Which of the following is not one of the extraembryonic membranes?

• chorion

• amnion

• placenta

• allantois

Which of the following occurs during early embryonic development in humans?

• ciliary action and muscular contraction move the embryo along oviduct.

• the embryo develops through the gastrula stage while it travels in the uterus.

• rapid division of the embryo occurs only after implantation.

Which of the following substances diffuse across the placenta from mother to the fetus?

• hormones

• blood

• carbon dioxide

When the zygote divides, cleavage occurs.

• true

• false

Implantation occurs about 36hours after fertilization.

• true

• false

During pregnancy progesterone prevents the degeneration of the corpus luteum.

• true

• false