Ch. 1 Questions Flashcards
At what stage of embryologic development does the ovum enter the uterus?
Morula
The respiratory system arises from which of the following germ layers?
Endoderm
The earliest development of the lung begins at:
8 weeks
Dichotomy of the airways occurs during which phase of lung development?
Pseudoglandular stage
Which of the following, when found in amniotic fluid, is the best indicator of fetal lung maturity?
Sphingomyelin
Which of the following does not appear to accelerate fetal lung maturation?
Aternal preeclampsia
Which of the following are true concerning lung fluid?
• there is approximately 20 to 30 mL/kg present at birth
• It has lower pH, protein, and HCO3 levels than amniotic fluid
• it maintains the patency of the developing airways
Which of the following may occur following Cesarean section?
TTN
The heart develops from which germ layer(s)?
Mesoderm
The embryonic truncus arteriosus develops into:
The pulmonary artery & the aorta
Which of the following describes the path of blood that is shunted through the foramen ovale?
From the right to left atrium
The ductus arteriosus shunts blood from:
The pulmonary artery to the aorta
Which of the following statements is correct?
Baroreceptors are actually stretch receptors
In the placenta, the fetal vessels are contained in the…?
Cotyledon
Which of the following statements best describes surface tension?
The molecules on the surface, while being drawn together inward, are not being pulled outward by the air molecules.
