What is NOT allowed to pass through the placental barrier between maternal and fetal blood supplies?
A) blood cells
B) wastes
C) certain gases
D) nutrients
Correct Answer:
Verified
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Q54: What makes estrogen and progesterone after the
Q56: Which hormone suppresses uterine contractions until birth?
A)melanocyte-stimulating
Q57: Which of the following vascular shunts connects
Q58: The first stage of labor is:
A)effacement.
B)dilation.
C)expulsion.
D)propulsion.
Q59: Which fetal hormone initiates labor?
A)estrogen
B)progesterone
C)prolactin
D)cortisol
Q60: An adult heart should have a:
A)ductus arteriosus.
B)ductus
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