Exam (elaborations)
Walden NURSING college Test-Bank-for-Introductory-
Chemistry-Concepts-and Critical-Thinking- IBCLC EXAM
QUESTIONS WITH ANSWERS Placenta -: answers :-
Intrauterine organ that transfers nutrients from the
mother to the fetus. After the d
IBCLC / Maternal-Child Health & Chemistry Test Bank
Section 1: Placenta & Fetal Development (continued 16–20)
16. Placenta previa is characterized by:
A. Placenta covering the cervix
B. Placenta detachment after 37 weeks
C. Excessive amniotic fluid
D. Placental calcification
Answer: A
Rationale: Placenta previa occurs when the placenta partially or completely covers the cervix, risking
maternal bleeding during delivery.
17. Which vitamin is critical for preventing neural tube defects and is transported via the placenta?
A. Vitamin C
B. Vitamin D
C. Folic acid (Vitamin B9)
D. Vitamin K
Answer: C
Rationale: Folic acid is actively transported to the fetus via the placenta and is essential for neural tube
formation.
, 18. The placenta metabolizes some substances before delivering them to the fetus. This process is
called:
A. Filtration
B. Biotransformation
C. Osmosis
D. Active transport
Answer: B
Rationale: Biotransformation by placental enzymes can modify or detoxify certain substances before
they reach the fetus.
19. Oxygen transfer in the placenta is primarily due to:
A. Active transport
B. Facilitated diffusion
C. Simple diffusion
D. Endocytosis
Answer: C
Rationale: Oxygen crosses the placenta mainly by simple diffusion from maternal to fetal blood.
20. True or False: The placenta produces progesterone throughout the entire pregnancy.
Answer: True
Rationale: After initial production by the corpus luteum, the placenta takes over progesterone
production to maintain uterine lining and pregnancy.
Section 2: Lactation & Breastfeeding (Questions 21–35)
21. The hormone responsible for milk production is:
A. Oxytocin
B. Prolactin
C. Estrogen
D. Progesterone
Answer: B
Rationale: Prolactin stimulates alveolar cells in the breast to produce milk.
22. Which hormone triggers milk ejection (“let-down reflex”)?
A. Prolactin
B. Oxytocin
Walden NURSING college Test-Bank-for-Introductory-
Chemistry-Concepts-and Critical-Thinking- IBCLC EXAM
QUESTIONS WITH ANSWERS Placenta -: answers :-
Intrauterine organ that transfers nutrients from the
mother to the fetus. After the d
IBCLC / Maternal-Child Health & Chemistry Test Bank
Section 1: Placenta & Fetal Development (continued 16–20)
16. Placenta previa is characterized by:
A. Placenta covering the cervix
B. Placenta detachment after 37 weeks
C. Excessive amniotic fluid
D. Placental calcification
Answer: A
Rationale: Placenta previa occurs when the placenta partially or completely covers the cervix, risking
maternal bleeding during delivery.
17. Which vitamin is critical for preventing neural tube defects and is transported via the placenta?
A. Vitamin C
B. Vitamin D
C. Folic acid (Vitamin B9)
D. Vitamin K
Answer: C
Rationale: Folic acid is actively transported to the fetus via the placenta and is essential for neural tube
formation.
, 18. The placenta metabolizes some substances before delivering them to the fetus. This process is
called:
A. Filtration
B. Biotransformation
C. Osmosis
D. Active transport
Answer: B
Rationale: Biotransformation by placental enzymes can modify or detoxify certain substances before
they reach the fetus.
19. Oxygen transfer in the placenta is primarily due to:
A. Active transport
B. Facilitated diffusion
C. Simple diffusion
D. Endocytosis
Answer: C
Rationale: Oxygen crosses the placenta mainly by simple diffusion from maternal to fetal blood.
20. True or False: The placenta produces progesterone throughout the entire pregnancy.
Answer: True
Rationale: After initial production by the corpus luteum, the placenta takes over progesterone
production to maintain uterine lining and pregnancy.
Section 2: Lactation & Breastfeeding (Questions 21–35)
21. The hormone responsible for milk production is:
A. Oxytocin
B. Prolactin
C. Estrogen
D. Progesterone
Answer: B
Rationale: Prolactin stimulates alveolar cells in the breast to produce milk.
22. Which hormone triggers milk ejection (“let-down reflex”)?
A. Prolactin
B. Oxytocin
