Podcast
Questions and Answers
At what gestational week does surfactant production begin in the fetus?
At what gestational week does surfactant production begin in the fetus?
- 20 weeks
- 24 weeks (correct)
- 30 weeks
- 34 weeks
What stimulates further secretion of surfactant into the fetal lungs?
What stimulates further secretion of surfactant into the fetal lungs?
- Fetal heart rate increase
- Exposure to amniotic fluid
- Increased fetal movement
- Labour and alveolar stretch (correct)
What is the primary function of surfactant in the lungs?
What is the primary function of surfactant in the lungs?
- Increasing blood flow to lungs
- Enhancing gas exchange
- Lowering surface tension (correct)
- Facilitating oxygen transport
At what week are mature levels of surfactant typically reached?
At what week are mature levels of surfactant typically reached?
What effect does surfactant have on functional residual capacity (FRC)?
What effect does surfactant have on functional residual capacity (FRC)?
Study Notes
Surfactant Production
- Initiates at 24 weeks of gestation, reaching mature levels by 34 weeks.
- Secretion into fetal lungs is enhanced by labor and the stretching of alveoli during the onset of ventilation.
- Surfactant plays a crucial role in reducing surface tension in the lungs.
- Lower surface tension facilitates lung inflation at reduced pressures, contributing to improved gas exchange.
- Increases functional residual capacity (FRC), which is essential for optimal respiratory function.
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Description
This quiz explores the production of surfactant in fetal development, starting at 24 weeks and reaching mature levels by 34 weeks. It highlights the role of surfactant in lowering surface tension in the lungs, facilitating inflation and enhancing functional residual capacity. Understanding this process is essential for grasping fetal respiratory physiology.
