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OB Final exam Nclex Questions and Correct Answers
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OB Final exam Nclex Questions and Correct Answers
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OB Final exam Nclex Questions and CorrectAnswers
An expectant father asks the nurse, "Which part of the mature sperm contains the
male chromosome?" What is the correct response by the nurse?
a. X-bearing sperm
b. The tail of the sperm
c. The head of the sperm
d. The middle portion of the sperm
✓ ~~~ ANS: C
✓ The head of the sperm contains the male chromosomes that will join the
chromosomes of the ovum. If an X-bearing sperm fertilizes the ovum, the baby will
be female. The tail of the sperm helps propel the sperm toward the ovum. The
middle portion of the sperm supplies energy for the tail's whip-like action.
One of the assessments performed in the birth room is checking the umbilical cord
for blood vessels. Which finding is considered to be within normal limits?
a. One artery and one vein
b. Two veins and one artery
c. Two arteries and one vein
d. Two arteries and two veins
, ✓ ~~~ ANS: C
✓ The umbilical cord contains two arteries and one vein to transport blood between the
fetus and the placenta. Any option other than two arteries and one vein is considered
abnormal and requires further assessment. Two veins and one artery is abnormal
and may indicate an anomaly. Two arteries instead is a normal finding; this infant
would require further assessment for anomalies due to the finding of two veins.
What is the purpose of the ovum's zona pellucida?
a. Prevents multiple sperm from fertilizing the ovum
b. Stimulates the ovum to begin mitotic cell division
c. Allows the 46 chromosomes from each gamete to merge
d. Makes a pathway for more than one sperm to reach the ovum
✓ ~~~ ANS: A
Fertilization causes the zona pellucida to change its chemical composition so that
multiple sperm cannot fertilize the ovum. Mitotic cell division begins when the nuclei
of the sperm and ovum unite. Each gamete (sperm and ovum) has only 23
chromosomes; there will be 46 chromosomes when they merge. Once sperm has
entered the ovum, the zona pellucida changes to prevent other sperm from entering.
The nurse is explaining the process of cell division during the preembryonic period to
a group of nursing students. Which statement best describes the characteristics of
the morula?
a. Fertilized ovum before mitosis begins
,b. Double layer of cells that becomes the placenta
c. Flattened, disk-shaped layer of cells within a fluid-filled sphere
d. Solid ball composed of the first cells formed after fertilization
✓ ~~~ ANS: D
The morula is so named because it resembles a mulberry. It is a solid ball of 12 to 16
cells that develops after fertilization. The fertilized ovum is called the zygote. The
placenta is formed from two layers of cells—the trophoblast, which is the other
portion of the fertilized ovum, and the decidua, which is the portion of the uterus
where implantation occurs. The flattened, disk-shaped layer of cells is the embryonic
disk; it will develop into the body.
The upper uterus is the best place for the fertilized ovum to implant due to which
anatomical adaptation?
a. Maternal blood flow is lower.
b. Placenta attaches most firmly.
c. Uterine endometrium is softer.
d. Developing baby is best nourished
✓ ~~~ ANS: D
The uterine fundus is richly supplied with blood and has the thickest endometrium,
both of which promote optimum nourishment of the fetus. The blood supply is rich in
the fundus, which allows for optimal nourishment of the fetus. If the placenta
, attaches too deeply, it does not easily detach. Softness is not a concern with
implantation; attachment and nourishment are the major concerns.
Some of the embryo's intestines remain within the umbilical cord during the
embryonic period because the
a. intestines need this time to grow until week 15.
b. nutrient content of the blood is higher in this location.
c. abdomen is too small to contain all the organs while they are developing.
d. umbilical cord is much larger at this time than it will be at the end of pregnancy.
✓ ~~~ ANS: C
The abdominal contents grow more rapidly than the abdominal cavity, so part of their
development takes place in the umbilical cord. By 10 weeks, the abdomen is large
enough to contain them. The intestines remain within the umbilical cord only until
about week 10. Blood supply is adequate in all areas; intestines stay in the umbilical
cord for about 10 weeks because they are growing faster than the abdomen.
Intestines begin their development within the umbilical cord, but only because the
liver and kidneys occupy most of the abdominal cavity, not because of the size of the
umbilical cord.
A patient who is 16 weeks pregnant with her first baby asks how long it will be before
she feels the baby move. Which is the nurse's best answer?
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