Exam 27: Development Heredity

Explain how the processes of gastrulation and organogenesis are related.

The fusion of a sperm cell and secondary oocyte is known as:

Is a single sperm cell capable of fertilizing a secondary oocyte alone? Explain.

Describe what is housed within the umbilical cord.

The embryonic period of prenatal development occurs from week 3 until week 8.

Failure of the allantois to fully develop will impact the formation of the:

Which germ layer forms the gonads and kidneys?

Determine the series of hormonal events that leads to birth. 1. Oxytocin stimulates the placenta to secrete prostaglandins. 2) Fetal cortisol stimulates the placenta to secrete estrogen. 3) Prostaglandins dilate the cervix, and with oxytocin, increase the strength of uterine contractions. 4) The high estrogen level stimulates the uterus to form oxytocin receptors.

Sperm entry into the secondary oocyte triggers the acrosomal reaction.

Which of the following is the inner germ layer?

When does the prenatal period begin?

Parturition is also known as:

During which process is exposure to teratogens ^most devastating for the development of the embryo's organs?

What cardiovascular changes are NOT typically expected in a pregnant female?

Which hormone suppresses uterine contractions until birth?

Cephalocaudal folding creates the:

Predict the possibility of an offspring with a widow's peak, a dominant inherited trait affecting the hairline, when both parents are heterozygous for the trait.

After fertilization, a zygote rapidly divides to produce small, genetically identical cells known as:

By what week of prenatal development will the placenta be established?

From what do both lanugo and the vernix caseosa protect the fetus?