Question

RCP 333 Study Guide for Test #1 1. Which stage of lung development continues after birth? 2. During which stage of lung development do lung buds form? nately what age do most of the alveoli 3. Regarding postnatal lung growth, by approximately what age do that will be present in the lungs for life develop? 4. Which of the following stages of lung development is marked by the formation the conducting airways? 5. What is responsible for synthesizing surfactant? 6. What is the purpose of surfactant? 7. Approximately how much fetal lung fluid is secreted daily? 8. What structure does the lung bud emerge from? 9. What fetal organ produces a majority of the amniotic fluid? 10. What is the function of Wharton's jelly inside the umbilical cord? 11. What is the function of the placenta? 12. How early can the fetal heartbeat be detected? 13. Identify the following: ductus venosus, foramen ovale, ductus arteriosus. 14. Discuss the path of oxygenated blood from the placenta to the fetus. 15. Which vessels carry deoxygenated blood from the fetus to the placenta? 16. Which vessel carries oxygenated blood from the placenta to the fetus? 17. How does transmission of hepatitis B form the mother to the fetus occur? 18. What is the average birth weight difference between infants born of mothers who smoke and those born of nonsmoking mothers? 19. How should a baby be delivered when there are active herpes lesions noted on the mother's cervix, vagina, or perineum?

Answer 1

13-1 stages ellveoli (edis Sac) development starts at birth (at 32 weeks) & continues after birth to childhood. Stage gas area exchange area expands & nerves & capillaries continue until 2 years of postnatal to develop until 2 years of pos Ans. 2 During embryonic stage of Mung. development (4-7 weeks) lung buds. form. The lung bud / respiratory bud form from the respiratory diverticulum which is an embryological endodermal tract organs such as the larynx , trachea bronchi & lungs Ans-3 ext 2 years of age in postnatal period most of the alveoli that will be present in the lungs for life develop. Ans-4 Pseudoglandular Stage (stage 2) - at this stage conducting aurways develop & lungs resembles a gland (between 5-17 weeke eans-5 Type I alveolvar epithelial cells also called pneumocytes are responsible to synthesize surfactant.

Ans-6 Lung surfactant's purpose lung surfactante purpose is to recluce the surface tension a air-liquid interface in the lung. Surfactant is a mixture of lipics proteins . purpose is to e tension at the ans. 7 Pulmonary epitheliun secretes fluud at a rate of aml/kg/hr in the initial part of pregnancy increasing to sml/kg/h at full term & approximated it contributes! to one third to a half of the daily turnover of amniotic fluid diverticulum . Ans-g lungs & Kidneys of fetus produces a majority of the amniotic fluid Ans 10 wharton's jelly protects the umbilical blood vessels, neutralizes the external pressure influence on blood flow between placenta & felus.