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Chapter 12 Conception and Prenatal Development
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Chapter 12 Conception and Prenatal Development
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Chapter 12: Conception and Prenatal DevelopmentTest Bank
MULTIPLE CHOICE
1. Which part of the mature sperm contains the male chromosomes?
a. The head of the sperm
b. The middle portion of the sperm
c. X-bearing sperm
d. The tail of the sperm
ANS: A
Feedback
A The head of the sperm contains the male chromosomes that will join the
chromosomes of the ovum.
B The middle portion of the sperm supplies energy for the tail’s whip-like action.
C If an X-bearing sperm fertilizes the ovum, the baby will be female.
D The tail of the sperm helps propel the sperm toward the ovum.
PTS: 1 DIF: Cognitive Level: Knowledge REF: p. 215
OBJ: Nursing Process: Assessment MSC: Client Needs: Health Promotion and Maintenance
2. One of the assessments performed in the delivery room is checking the umbilical cord
for blood vessels. Which finding is considered within normal limits?
a. Two arteries and one vein
b. Two arteries and two veins
c. Two veins and one artery
d. One artery and one vein
ANS: A
Feedback
A The umbilical cord contains two arteries and one vein to transport blood between
the fetus and the placenta.
B This option is abnormal and may indicate other anomalies.
C Any option other than two arteries and one vein is considered abnormal and
requires further assessment.
D The presence of one umbilical artery is considered an abnormal finding. This
infant would require further assessment for other anomalies.
PTS: 1 DIF: Cognitive Level: Knowledge REF: p. 229
OBJ: Nursing Process: Assessment MSC: Client Needs: Health Promotion and Maintenance
3. The purpose of the ovum’s zona pellucida is to
a. Make a pathway for more than one sperm to reach the ovum.
b. Allow the 46 chromosomes from each gamete to merge.
, c. Prevent multiple sperm from fertilizing the ovum.
d. Stimulate the ovum to begin mitotic cell division.
ANS: C
Feedback
A Once one sperm has entered the ovum, the zona pellucida changes to prevent
other sperm from entering.
B Each gamete (sperm and ovum) has only 23 chromosomes. There will be 46
chromosomes when they merge.
C Fertilization causes the zona pellucida to change its chemical composition so
that multiple sperm cannot fertilize the ovum.
D Mitotic cell division begins when the nuclei of the sperm and ovum unite.
PTS: 1 DIF: Cognitive Level: Knowledge REF: p. 216
OBJ: Nursing Process: Assessment MSC: Client Needs: Health Promotion and Maintenance
4. While teaching an early pregnancy class, the nurse explains that the morula is a
a. Fertilized ovum before mitosis begins
b. Flattened disc-shaped layer of cells within a fluid-filled sphere
c. Double layer of cells that becomes the placenta
d. Solid ball composed of the first cells formed after fertilization
ANS: D
Feedback
A The fertilized ovum is called the zygote.
B This is the embryonic disc. It will develop into the baby.
C The placenta is formed from two layers of cells: the trophoblast, which is the
other portion of the fertilized ovum, and the deciduas, which is the portion of the
uterus where implantation occurs.
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.
PTS: 1 DIF: Cognitive Level: Knowledge REF: p. 217
OBJ: Nursing Process: Assessment MSC: Client Needs: Health Promotion and Maintenance
5. The upper uterus is the best place for the fertilized ovum to implant because it is here that the
a. Placenta attaches most firmly
b. Developing baby is best nourished
c. Uterine endometrium is softer
d. Maternal blood flow is lower
ANS: B
Feedback
A If the placenta attaches too deeply, it does not easily detach after birth.
B The uterine fundus is richly supplied with blood and has the thickest
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