Page 633 - Saunders Comprehensive Review For NCLEX-RN

products from the fetus, and one umbilical vein carries oxygenated blood and
provides oxygen and nutrients to the fetus. Blood pumped by the embryo’s heart
leaves the embryo through two umbilical arteries.
Test-Taking Strategy: Focus on the subject, fetal circulation. Recall that three
umbilical vessels are within the umbilical cord (two arteries and one vein) and that
the vein carries oxygenated blood and the arteries carry deoxygenated blood. Also
recalling the normal fetal heart beat will assist in answering correctly.
Level of Cognitive Ability: Applying
Client Needs: Physiological Integrity
Integrated Process: Teaching and Learning
Content Area: Maternity: Antepartum
Health Problem: N/A
Priority Concepts: Client Education; Perfusion
Reference: McKinney et al. (2018), pp. 210-211.

185. Answer: 3

Rationale: The ductus venosus connects the umbilical vein to the inferior vena
cava. The foramen ovale is a temporary opening between the right and left atria. The
ductus arteriosus joins the aorta and the pulmonary artery.
Test-Taking Strategy: Focus on the subject, the description of the ductus venosus.
Note the relationship of the word venosus in the question and vein in the correct
option.
Level of Cognitive Ability: Evaluating
Client Needs: Physiological Integrity
Integrated Process: Nursing Process/Evaluation
Content Area: Maternity: Antepartum
Health Problem: N/A
Priority Concepts: Perfusion; Reproduction
Reference: McKinney et al. (2018), pp. 210-211.

186. Answer: 1

Rationale: Between weeks 16 and 20, the external genitalia of the fetus have
developed to such a degree that the sex of the fetus can be determined visually.
Differentiation of the external genitalia occurs at the end of the ninth week. Testes
begin to descend into the scrotal sac at the end of the 38th week. Internal differences
in the male and female occur at the end of the seventh week.
Test-Taking Strategy: Focus on the subject, sex of the fetus. Remember that the
sex of the fetus can be recognizable visually on ultrasound by the appearance of the
external genitalia by gestational weeks 16 and 20.
Level of Cognitive Ability: Applying
Client Needs: Health Promotion and Maintenance
Integrated Process: Teaching and Learning
Content Area: Maternity: Antepartum
Health Problem: N/A
Priority Concepts: Development; Sexuality

633