Exam 29: Development,Pregnancy,and Heredity

Braxton-Hicks contractions tend to be

The structure of the mesoderm that induces formation of the neural tube is the

Implantation usually begins at about the end of the first ________ of development.

During the dilation stage,the cervix expands and becomes thinner.This stage ends once the cervix has fully dilated and ________ (thinned).

What is the correct order of structures through which the sperm penetrates during fertilization

The beginning of labor involves increased production of ________ from the fetal hypothalamus,resulting in secretion of _________ by the placenta.

In pregnant women,the high levels of estrogen and progesterone secretion seem to lead to

When epiblast cells travel through the primitive streak and underneath the epiblast layer,that movement is described as

Breastfeeding prolongs the duration of time it takes for the uterus to shrink to its pre-pregnancy size.

Approximately when in development does the bilaminar germinal disc begins to form

Human chorionic gonadotropin is secreted from cells of the

Capacitation lasts several ________ and involves removal of ___________.

Blocklike masses that form from paraxial mesoderm and develop into muscle,axial skeleton,cartilage,and dermis are known as __________.

A trait is said to exhibit ____________ dominance when the phenotype of a heterozygous individual is intermediate between the phenotypes of individuals who are homozygous dominant and individuals who are homozygous recessive.

The pre-embryonic period ends when

Polyspermy results in the production of monozygotic twins.

When pregnant,a woman has an increased sensitivity to the hormone angiotensin.

After ovulation,the oocyte

The maturation that occurs within the pre-embryonic and embryonic periods is known as __________.

Cells within the embryoblast have the ability to differentiate into any type of cell within the body.