-
The cells of a blastocyst that give rise to the body of the developing offspring constitute the
inner cell mass
-
The placental membrane is composed of
a single layer of epithelial cells
-
The ductus venous is a fetal vessel that functions to transport blood from the umbilical vein to
inferior vena cava
-
The foramen ovale is an opening that allows fetal blood to pass from the
right atrium to the left atrium
-
The fetal blood that passes through the ductus venosus is relatively
high in oxygen and nutrients
-
As a result of the foramen ovale, blood is allowed to bypass the
lungs
-
The ductus arteriosus allows fetal blood to move from the
pulmonary trunk into the aorta
-
Which of the following factors seems to stimulate a newborns first breath?
all of these are correct
-
Which of the following provides the main source of energy for a newborn during its first few days?
glucose
-
After birth, the foramen ovale is closed as a result of
increasing pressure in the left atrium
-
Following birth, bradykinin is released from the newborn's lungs in response to
constriction of the ductus venosus
-
Which of the following is not a characteristic of childhood?
becoming reproductively functional
-
As a rule, during adulthood
all of these are correct
-
The placenta is composed of tissues from the
mother only
-
Which of the following is true in regard to the fetal stage of development?
All of these are correct
-
The symptoms of fetal alcohol syndrome include
all of these are correct
-
A major difference between fetal blood flow and adult blood flow is that in the fetus the
inferior vena cava contains blood high in oxygen
-
Which of the following adult structures is not derived from the same primary germ layer as the others
nerves
-
The external genitalia of the fetus can be distinguished as male or female by which of the following periods after fertilization?
about 12 weeks
-
Which of the following combinations would be needed to cause the development of dizygotic twins?
two egg cells and two sperm cells
-
Most commonly, a blastocyst becomes implanted in the uterine's
upper posterior wall
-
The placenta synthesizes progesterone from
cholesterol
-
Teratogens are substances that
cause congenital malformations
-
A blastomere is a __ and a blastocyst is ___
cell produced by cleavage; a hollow ball of cells
-
During the embryonic stage, the primary germ layers develop from the
embryonic disk
-
The major body parts derived from endoderm are the epithelial lining of the
all of these are correct
-
Amniotic fluid functions to
protect the embryo against being jarred by movements of the mother's body
-
The yolk sac functions to
form blood cells in early development
-
The term newborn refers to the period from birth through___, whereas the term infant refers to the period from ___
the first four weeks; the first month to a year
-
Conception normally occurs
in the uterine tube
-
The sideways movement of sperm tails as well as muscle contractions within the walls of the uterus are stimulated by
prostaglandins
-
___ is the process of preparing the sperm for penetration of the oocyte
maturation
-
One of the enzymes secreted by sperm which is important for penetration is
hyaluronidase
-
Which of the following layers is considered loosely organized connective tissue?
epidermis
-
Labor is regulated by
positive feedback control
-
The fetus is protected from certain
antibodies from the mother's immune system
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