OB NCLEX Final Exam Questions, 100%
Accurate, graded A+. latest version.
The total number of chromosomes contained in a mature sperm or ovum is:
a. 22.
b. 23.
c. 44.
d. 46. - ✔✔-ANS: B
Gametes (sex chromosomes) c
...
OB NCLEX Final Exam Questions, 100%
Accurate, graded A+. latest version.
The total number of chromosomes contained in a mature sperm or ovum is:
a. 22.
b. 23.
c. 44.
d. 46. - ✔✔-ANS: B
Gametes (sex chromosomes) contain 23 chromosomes.
A pregnant woman states, "My husband hopes I will give him a boy because we have three girls." The
nurse explains that:
a. the sex chromosome of the fertilized ovum determines the gender of the child.
b. when the sperm and ovum are united, there is a 75% chance the child will be a girl.
c. when the pH of the female reproductive tract is acidic, the child will be a girl.
d. if a sperm carrying a Y chromosome fertilizes an ovum, then a boy is produced. - ✔✔-ANS: D
When a Y-bearing sperm fertilizes an ovum, a male child is produced.
Using a diagram, the nurse points out the most common site for fertilization, which is the:
a. lower segment of the uterus.
b. outer third of the fallopian tube near the ovary.
c. upper portion of the uterus.
d. area of the fallopian tube farthest from the ovary. - ✔✔-ANS: B
Fertilization takes place in the outer third of the fallopian tube, which is closest to the ovary.
The embryo is termed a fetus at which stage of prenatal development?
a. 2 weeks
b. 4 weeks
c. 9 weeks
d. 16 weeks - ✔✔-ANS: C
The fetus (third stage of prenatal development) begins at the ninth week and continues until the 40th
week of gestation or until birth.
The nurse explains to a pregnant patient that blood is circulating through the placenta to the fetus by
way of:
a. one umbilical vein.
b. two umbilical veins.
c. one umbilical artery.
d. two umbilical arteries. - ✔✔-ANS: A
The umbilical vein transports richly oxygenated blood from the placenta to the fetus.
The nurse explains that the usual location for implantation of the zygote is the:
a. upper section of the posterior uterine wall.
b. lower portion of the uterus near the cervical os.
c. inner third of the fallopian tube near the uterus.
d. lateral aspect of the uterine wall. - ✔✔-ANS: A
The zygote usually implants in the upper section of the posterior uterine wall.
The embryonic membrane that contains fingerlike projections on its surface, which attach to the uterine
wall, is the:
a. amnion.
b. yolk sac.
c. chorion.
d. decidua basalis. - ✔✔-ANS: C
The chorion is a thick membrane with fingerlike projections (villi) on its outermost surface.
The nurse explains that the hormone responsible for converting the endometrium into decidual cells for
implantation is:
a. estrogen.
b. human chorionic gonadotropin.
c. human placental lactogen.
d. progesterone. - ✔✔-ANS: D
At high levels, progesterone maintains the endometrial lining for implantation of the zygote.
When the patient asks when her infant's heart will begin to pump blood, the nurse replies that blood
circulation begins:
a. by the end of week 3.
b. beginning in week 8.
c. at the end of week 16.
d. beginning in week 24. - ✔✔-ANS: A
The fetal heart begins to pump by week 3 of gestation.
In fetal circulation, the purpose of the ductus venosus is to bypass the:
a. liver.
b. heart.
c. lungs.
d. kidneys. - ✔✔-ANS: A
Fetal blood bypasses the liver through the ductus venosus by carrying blood directly to the inferior vena
cava.
Untreated respiratory distress in the newborn could cause which complication?
a. Esophageal atresia
b. Gastric dilation
c. Cold stress
d. Reopening of the foramen ovale - ✔✔-ANS: D
Respiratory distress can cause increased pressure in the right ventricle, causing reopening of the
foramen ovale.
During an ultrasound, two amnions and two placentas are observed. The nurse is aware that this
pregnancy will result in _____ twins.
a. dizygotic
b. monozygotic
c. conjoined
d. high birth-weight - ✔✔-ANS: A
Dizygotic twins always have two amnions and two chorions (placentas).
A woman who is 25 weeks pregnant asks the nurse what her fetus looks like. The nurse explains that
one physical characteristic present in a 25-week-old fetus is:
a. lanugo covering the body.
b. constant motion.
c. skin that is pink and smooth.
d. eyes that are closed. - ✔✔-ANS: A
By 25 weeks, the body of the fetus is covered with lanugo, the eyes are open, the skin is wrinkled, and
the fetus has definite periods of movement and sleeping.
At what point in prenatal development do the lungs begin to produce surfactant?
a. 17 weeks
b. 20 weeks
c. 25 weeks
d. 30 weeks - ✔✔-ANS: C
During week 25, the alveoli begin to produce surfactant, which enables the alveoli to stay open for
adequate lung oxygenation to occur.
A woman missed her menstrual period 1 week ago and has come to the doctor's office for a pregnancy
test. The nurse knows that the placental hormone measured in pregnancy tests is:
a. progesterone.
b. estrogen.
c. human chorionic gonadotropin.
d. human placental lactogen. - ✔✔-ANS: C
Human chorionic gonadotropin is the basis for most pregnancy tests. It is detectable in maternal blood
as soon as implantation occurs, usually 7 to 9 days after fertilization.
When preparing to teach a class about prenatal development, the nurse would include information
about folic acid supplementation because it is known to prevent:
a. congenital heart defects.
b. neural tube defects.
c. mental retardation.
d. premature birth - ✔✔-ANS: B
It is now known that folic acid supplements can prevent neural tube defects such as spina bifida.
The nurse informs a class of expectant parents that the fetus is first considered viable at the age of
_____ weeks.
a. 14
b. 20
c. 25
d. 30 - ✔✔-ANS: B
By 20 weeks of gestation, the lungs have matured enough for the fetus to survive outside the uterus
(age of viability).
The nurse explains that if one parent has a dominant gene and the other parent does not, the
percentage of children carrying the dominant gene will be:
a. 10%.
b. 25%.
c. 50%.
d. 100%. - ✔✔-ANS: C
If one parent has a dominant trait and the other does not, then 50% of the children will inherit the trait.
The nurse explains that monozygotic twins are frequently below average birth weight because of
inadequate:
a. space in the uterus.
b. blood supply.
c. maternal health.
d. placental nutrition. - ✔✔-ANS: D
The single placenta may not be able to provide adequate nutrition to two fetuses.
The school nurse counseling a group of adolescent girls states that sperm ejaculated near the cervix:
a. are destroyed by the acidic pH of the vagina.
b. survive up to 5 days and can cause pregnancy.
c. lose their motility in about 12 hours after interco
[Show More]
